The solution to the system of equations is (3, -2). Therefore, the correct answer is A) (3, -2).
To solve this system of equations using substitution, we need to isolate one of the variables in one of the equations and substitute it into the other equation. We can choose to isolate x in the second equation:
x = 2y + 7
Now we can substitute this expression for x in the first equation:
3x + 2y = 5
3(2y + 7) + 2y = 5
6y + 21 + 2y = 5
8y = -16
y = -2
Now that we know the value of y, we can substitute it back into either of the original equations to find the value of x. We'll use the second equation for this:
x = 2y + 7 = 2(-2) + 7 = 3
Therefore, the correct answer is A) (3, -2).
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In a triangle PQR,the sides PQ, QR and PR measure 15 in, 20 in and 25 in respectively.
Triangle PQR's perimeter is **60 inches**.
What is the triangle's perimeter?The lengths of a triangle's sides added together form its perimeter.
Pythagorean triplet: what is it?The Pythagorean theorem asserts that in a right-angled triangle, the square of the hypotenuse's length (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides 1. A Pythagorean triplet is a group of three positive integers that satisfies this condition.
Triangle PQR has sides PQ = 15 inches, QR = 20 inches, and PR = 25 inches.
A triangle's perimeter is equal to the sum of its sides. Triangle PQR's perimeter is 15 + 20 + 25= **60 inches**. as a result.
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the weights of newborn baby boys born at a local hospital are believed to have a normal distribution with a mean weight of 3245 grams and a standard deviation of 625 grams. if a newborn baby boy born at the local hospital is randomly selected, find the probability that the weight will be greater than 2620 grams. round your answer to four decimal places.
The probability that the weight of a randomly selected newborn baby boy born at the local hospital will be greater than 2620 grams is 0.9099 (rounded to four decimal places).
The probability can be calculated using the standard normal distribution as follows:
P(Z > (2620 - 3245) / 625) = P(Z > -1.335)
Using a standard normal distribution table, we find that the probability of Z being greater than -1.335 is 0.9099.
We use the standard normal distribution because we know the mean and standard deviation of the population of newborn baby boys' weights. We convert the raw score of 2620 grams to a z-score, which tells us how many standard deviations the raw score is away from the mean.
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!!!!!!I NEED THIS ASAP!!!!!
Find x,y, and z
Applying the right triangle altitude theorem and the leg rule, we have:
5. x = 6; y ≈ 6.7; z ≈ 13.4 6. x = 32; y ≈ 35.8; z ≈ 17.9
What is the Right Triangle Altitude of a Theorem?The right triangle altitude theorem states that the altitude drawn on the hypotenuse of a right triangle is equal to the geometric mean of the two line segments into which the altitude divides the hypotenuse.
5. To find x, apply the right triangle altitude theorem, which is:
x = √(3*12)
x = √36
x = 6
Using the leg rule, we can find y and z. It is expressed as:
hypotenuse/leg = leg/part
Therefore, substitute and find y:
(3 + 12) / y = y / 3
Cross multiply:
y² = 15 * 3
y = √45
y ≈ 6.7
Find z using the leg rule:
15/z = z/12
z² = 180
z = √180
z ≈ 13.4
6. Use the same theorem and leg rule as done in question 5:
Find x:
16 = √(8 * x)
16² = 8x
256 = 8x
x = 256/8
x = 32
Find y using the leg rule:
(8 + 32) / y = y/32
y² = 40 * 32
y = √1,280
y ≈ 35.8
Find z:
40/z = z/8
z² = 40 * 8
z = √320
z ≈ 17.9
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two fair 6-sided dice are rolled. what is the probability that the sum of the two numbers on the dice is greater than 10?
The probability of rolling a sum greater than 10 is 4/36, which simplifies to 1/9, or approximately 0.1111.
There are 36 possible outcomes when rolling two 6-sided dice. Each outcome is equally likely.
To find the probability of rolling a sum greater than 10, we need to count the number of outcomes where the sum is greater than 10, and then divide by the total number of outcomes.
The outcomes where the sum is greater than 10 are:
4 + 6 = 10
5 + 6 = 11
6 + 5 = 11
6 + 6 = 12
So there are 4 possible outcomes where the sum is greater than 10.
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Julian goes to a store an buys an item that costs � x dollars. He has a coupon for 20% off, and then a 4% tax is added to the discounted price. Write an expression in terms of � x that represents the total amount that Julian paid at the register.
The expression that represents the total amount that Julian paid at the register in terms of x is 0.84x.
What is Percentage?
Percentage is a way of expressing a proportion or fraction as a quantity out of 100. The word "percent" means "per hundred," so percentages are often denoted by the symbol %, which represents one part in a hundred.
The first step is to find the discounted price after the 20% discount. This can be found by multiplying the original price by (1 - 0.2), which represents a 20% reduction.
Discounted price = x - 0.2x = 0.8x
Next, a 4% tax is added to the discounted price. This can be found by multiplying the discounted price by (1 + 0.04), which represents a 4% increase.
Total amount paid = (0.8x) * (1 + 0.04) = 0.84x
Therefore, the expression that represents the total amount that Julian paid at the register in terms of x is 0.84x.
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consider straight wires of equal lengths with their ends soldered together to form the edges of a cube. either silver or copper wire can be used for each edge. how many different ways can the cube be constructed?
The number of valid ways to construct the cube is [tex]4096 - 48 = 4048[/tex]
Each corner of the cube is formed by three wires coming together. Since the wires are soldered together at the ends, each corner must have either 3 silver wires or 3 copper wires coming together.
There are two choices for each wire: it can be silver or copper. Since there are 12 edges in a cube, there are 2 choices for each edge, giving a total of [tex]2^12 = 4096[/tex] possible arrangements of the edges.
However, not all of these arrangements are valid. We must eliminate the arrangements where at least one corner has two silver wires and one copper wire
There are 8 corners in a cube, and for each corner, there are 3 ways to choose which wire is different from the other two. Once we choose which wire is different, there are 2 choices for its color (silver or copper). Thus, there are [tex]8 x 3 x 2 = 48[/tex] invalid arrangements.
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State the amplitude, period, phase shift, and vertical shift of the function kt=cos2pit/3
Answer:
The given function is k(t) = cos(2πt/3).
The general form of a cosine function is A*cos(Bx - C) + D, where:
A is the amplitudeB is the frequency (which is related to the period)C is the phase shiftD is the vertical shiftComparing this form to the given function, we can see that:
The amplitude of k(t) is A = 1, since the maximum value of the cosine function is 1 and the minimum value is -1.The frequency of k(t) is B = 2π/3, since the argument of the cosine function is 2πt/3. The frequency is related to the period T by the formula T = 2π/B. Therefore, the period of k(t) is T = 3.The phase shift of k(t) is C = 0, since there is no horizontal shift in the argument of the cosine function.The vertical shift of k(t) is D = 0, since the average value of the cosine function over one period is zero.Therefore, the amplitude of k(t) is 1, the period of k(t) is 3, the phase shift of k(t) is 0, and the vertical shift of k(t) is 0.
Write a sine function that has an amplitude of 3, a midline of y =2 and a period of 1
the sine function that meets the given conditions is:
[tex]y(t) = 3 \times sin ((2\pi / 1200) \times t) + 2[/tex]
Function with the given characteristics.
The terms and their definitions we need to consider:
Amplitude:
The maximum displacement from the midline (in this case, 3)
Midline:
The horizontal line that passes through the center of the wave (y = 2)
Period:
The length of one complete cycle of the wave (1200)
Now, let's write the sine function:
[tex]y(t) = A \times sin (B \times t) + C[/tex]
Where:
y(t) is the sine function with respect to time (t)
A is the amplitude (3)
B is the frequency (to be determined)
C is the midline (2)
First, we need to find the frequency (B).
The period and frequency are related by the following formula:
[tex]Period = 2\pi / B[/tex]
In this case, the period is 1200:
[tex]1200 = 2\pi / B[/tex]
Now, solve for B:
[tex]B = 2\pi / 1200[/tex]
Now, we can plug in the amplitude (A), frequency (B), and midline (C) into our sine function:
[tex]y(t) = 3 \times sin((2\pi / 1200) \times t) + 2[/tex]
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‼️WILL MARK BRAINLIEST‼️
As a result, Alex should use a circle graph to display his data set because it can effectively convey to his manager the percentage of each flower kind that was planted.
Why is a circle graph the best choice for the given data?To visualise information and data, use a circle graph or pie chart. Typically, a circle graph is used to quickly and proportionately display the findings of an investigation.
What kind of graph does a circle represent in terms of data?A pie chart, often known as a circle chart, is a visual representation of the various values of a given variable or a means to summarise a set of nominal data. This kind of diagram consists of a circle with numerous segments.
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the integers from 1 to 15, inclusive, are partitioned at random into two sets, one with 7elements and the other with 8. what is the probability that 1 and 2 are in the same set?
The chance/
probability
is
16/33
, or roughly 0.485 that 1 and 2 are in the
same set.
Let's say we divide the range of numbers from
1 to 15
into two sets, each containing seven and eight numbers, respectively. Finding the likelihood that the numbers 1 and 2 are included in the same
set
is our goal.
We can determine the
total number
of ways to divide the numbers into the two sets of
7
and
8
in order to begin solving this issue. Calculating this yields the result 6435 using a formula.
The number of ways in which the pairs 1 and 2 can be found in the same set must then be determined. Considering that there are
seven numbers
in the set, we must select six more from the remaining thirteen to complete the set, presuming that one is among the seven .There are
1716
ways to do this. The number of methods remains the same, 1716, even if we suppose that 2 is among the set of 7 numbers.
Hence, there are
3432
different ways to combine the numbers 1 and 2 into one set. The chance is 16/33, or roughly 0.485, when we divide this number by the total number of possible
divisions
of the numbers.
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A football team consists of:
• 10 sixth graders
• 14 seventh graders
• 16 eighth graders
A student on the team will be randomly chosen to participate in the coin toss each of the 40
games of the season.
What is a reasonable prediction for the number of times a sixth or seventh grader will be
chosen?
A reasonable prediction for the number of times a sixth or seventh grader will be chosen is 24 out of the 40 games.
What is reasonable prediction?
A reasonable prediction is a prediction made with a reasonable degree of accuracy or likelihood, based on available information and knowledge. It is based on facts, past events, and logical assumptions, and is not based on conjecture or guesswork. Reasonable predictions can be made about future events, trends, and outcomes, and can be used to inform decisions, plans, and strategies.
The total number of sixth and seventh graders on the team is:
10 sixth graders + 14 seventh graders = 24 students
The total number of students on the team is:
10 sixth graders + 14 seventh graders + 16 eighth graders = 40 students
To find the expected number of times a sixth or seventh grader will be chosen in the coin toss, we can use the proportion of sixth and seventh graders to the total number of students:
(expected number of times) = (proportion of sixth and seventh graders) * (total number of coin tosses)
(expected number of times) = (24/40) * 40
(expected number of times) = 24
Therefore, a reasonable prediction for the number of times a sixth or seventh grader will be chosen is 24.
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armer needs a fenced-in 1 square kilometer rectangular region. on one of the four sides, she decides to use fencing that costs three times as much as the fencing on the other three sides. what dimensions will minimize the cost of the fence?
The dimensions will minimize the cost of fence 3555C, armer needs a fenced-in 1 square kilometer rectangular region.
Let the length of the rectangular region be 'l' and the width be 'w'. The area of the rectangular region is given by:
A = lw = 1 sq. km = 1000 x 1000 sq. m
We need to minimize the cost of the fence, which consists of three sides with fencing of cost C and one side with fencing of cost 3C. The total cost of the fence is given by:
Cost = 3Cw + C(2l + w) = 2C(l + w) + Cw
To minimize the cost, we take the derivative of the cost function with respect to w and set it equal to zero:
dCost/dw = 2C - C[tex]w^{(-2)}[/tex]l = 0
Solving for l, we get:
l = 2w
Substituting this value of l in the area equation, we get:
w(2w) = 1000000
2w² = 1000000
w² = 500000
w = √(500000) m = 707.1 m
So, the width of the rectangular region is 707.1 m and the length is 2w = 2 x 707.1 m = 1414.2 m.
Therefore, the dimensions that minimize the cost of the fence are 707.1 m x 1414.2 m and the minimum cost of the fence is:
Cost = 2C(l + w) + Cw = 2C(1414.2 + 707.1) + C(707.1) = 3555C.
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Solve the Simple Interest
Ruby contributes 12% of the total cost of her individual health care. This is a $57.50 deduction from each of her biweekly paychecks. What is the total value of her individual coverage for the year? Find its employer share.
Using simple interest we know the Total value of annual health coverage is $9000.
What is simple interest?Borrowers must pay lenders simple interest as a fee in exchange for a loan.
Compound interest is excluded from the calculation and just the original principal is used.
Simple interest applies to all loans, not just specific ones.
Additionally, it refers to the kind of interest that banks give their customers on their savings accounts.
So, complete yearly health coverage calculation
Let x be the total annual healthcare budget.
Ruth contributes 18% of the entire cost of healthcare, or $67.50 for two weeks. (ie 15 days)
So, total paid for one month = 67.5 x 2 = 135
The total amount paid for the entire year is 135 x 12 = 1620.
She foots 18% of the overall annual health care costs, as was already established.
Then,
18% x = 1620
18 x / 100 = 1620
x = (1620 x 100) / 18
= $9000
Therefore, using simple interest we know the Total value of annual health coverage is $9000.
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Correct question:
Ruth contributes 18% of the total cost of her individual health care. This is a $67.50 deduction from each of her biweekly paychecks. What is the total value of her individual coverage for the year?
An angle measures 37.6° more than the measure of its complementary angle. What is the measure of each angle?
The pair of required complementary angles are 26.2° and 63.8° respectively.
What are complementary angles?Two angles are said to be supplementary angles because they combine to generate a linear angle when their sum is 180 degrees.
When two angles add up to 90 degrees, however, they are said to be complimentary angles and together they make a right angle.
If the total of two angles is 90o (ninety degrees), then the angles are complementary.
A 30-angle and a 60-angle, for instance, are two complementary angles.
So, to find the 2 angles which are complementary:
x + x + 37.6 = 90
Now, solve it as follows:
x + x + 37.6 = 90
2x = 90 - 37.6
2x = 52.4
x = 52.4/2
x = 26.2
Now, x = 26.2 and the second angle x + 37.6 is = 26.2 + 37.6 = 63.8°.
Therefore, the pair of required complementary angles are 26.2° and 63.8° respectively.
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You are helping with some repairs at home. You drop a hammer and it hits the floor at a speed of 4 feet per second. If the acceleration due to gravity (g) is 32 feet/second 2, how far above the ground (h) was the hammer when you dropped it? Use the formula:
Step-by-step explanation:
vf = vo + at vo = 0 in this case ( you dropped it from 'at rest')
4 f/s = 32 t
t = 1/8 s
df = do + vot + 1/2 at^2 df = final position = 0 ft (on the ground)
0 = do + 0 + 1/2 (-32)(1/8)^2
solve for do = 1/4 foot
A coordinate plane. The x- and y-axes each scale by one. A graph of a line intersects the points negative four, negative three and negative one, negative two. A coordinate plane. The x- and y-axes each scale by one. A graph of a line intersects the points negative four, negative three and negative one, negative two. What is the slope of the line?
The slope of the line on this graph is equal to 1/3.
How to calculate or determine the slope of a line?In Mathematics and Geometry, the slope of any straight line can be determined by using the following mathematical equation;
Slope (m) = (Change in y-axis, Δy)/(Change in x-axis, Δx)
Slope (m) = rise/run
Slope (m) = (y₂ - y₁)/(x₂ - x₁)
By substituting the given data points into the slope formula, we have the following;
Slope (m) = (-2 - (-3))/(-1 - (-4))
Slope (m) = (-2 + 3)/(-1 + 4)
Slope (m) = 1/3
Based on the graph, the slope is the change in y-axis with respect to the x-axis and it is equal to 1/3.
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The slope of the coordinate line is 1/3.
Coordinate plane calculation.
To find the slope of the line that passes through the points (-4, -3) and (-1, -2), we use the slope formula:
slope = (change in y) / (change in x)
The change in y is -2 - (-3) = 1, and the change in x is -1 - (-4) = 3. Therefore, the slope is:
slope = 1 / 3
So the slope of the line is 1/3.
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Find the volume of a pyramid with a square base, where the area of the base is 19. 6 ft 2 19. 6 ft 2 and the height of the pyramid is 11. 6 ft 11. 6 ft. Round your answer to the nearest tenth of a cubic foot
If the area of the base is 19. 6 ft^2 and the height of the pyramid is 11. 6 ft, the volume of the pyramid is approximately 79.1 cubic feet.
The formula for the volume of a pyramid is given by:
V = (1/3) × base area × height
In this case, we are given that the pyramid has a square base, so the base area is simply the area of a square with side length s:
base area = s^2 = 19.6 ft^2
We are also given the height of the pyramid:
height = 11.6 ft
Substituting these values into the formula for the volume of a pyramid, we get:
V = (1/3) × base area × height
= (1/3) × 19.6 ft^2 × 11.6 ft
≈ 79.1 ft^3 (rounded to the nearest tenth)
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true or false: at the initial examination in the framingham study, coronary heart disease was found in 5 per 1000 men ages 30-44, and in 5 per 1000 women ages 30-44. the inference that in this age group men and women have an equal risk of getting coronary heart disease is incorrect because the data are prevalence data and not incidence data. group of answer choices true false
The inference is that, Incorrect because of a failure to distinguish between incidence and prevalence.
What is inference drawn from statistics?
Utilising data analysis to determine characteristics of a probability distribution at play, statistical inference is the process. Through the use of estimation and hypothesis testing, inferential statistical analysis infers characteristics of a population. It is presumed that a bigger population than the observed data set was sampled for this data collection.
What distinguishes random assignment from random sampling inferences?
As a method of choosing participants for your study's sample, random selection or random sampling can be used. The sample can be divided into control and experimental groups using random assignment, however.
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The complete question is -
At the initial examination in the Framingham study, coronary heart disease was found in 5 per 1,000 men aged 30yrs to 44yrs and in 5 per 1,000 women aged 30yrs to 44yrs. The inference that in this age group men and women have an equal risk of developing coronary heart disease is Selected Answer: A. Correct Answers: A. Correct B. Incorrect because of a failure to distinguish between incidence and prevalence C. Incorrect because a proportionate ratio is used when a rate is required to support the inference D. Incorrect because of failure to recognize a possible cohort phenomenon E. Incorrect because there is no control or comparison group.
please help with these assap will give brainlest!!
Answer:
below
Step-by-step explanation:
58.
(72 + 75 + 68 + 70 + 73 + 72 + 76 + 72 + 69 + 72 ) divided by 10 = 71.9
59.
order- 68, 69, 70, 72 , 72, 72, 72, 73, 75, 76
median = (72 + 72) divided by 2 = 72
61.
I dont know what MAD means
this is all I could do rn
What is the remainder? Equation is below.
Answer:
-23. In my explanation I will include in my picture how this will look in your final answer
Step-by-step explanation:
So to solve this, I first set x + 3 = 0. This means that x = -3, which we will use soon. Now, here's how you would work out this problem. It would be confusing if I explained over text, so I included a picture of my work.
You would first set up your problem like it is in the picture. Then, bring 2 down. Next, multiply 2 by -3 (for future problems, you would multiply the number you brought down by whatever number is on the side). -3 × 2 = -6, so you would put that under 3 (as shown in the picture). Now, add 3 and -6 (which = -3). Repeat this step each time.
I hope this made sense! Please let me know if you have any questions.
a grocery store company wanted to know how well some of their local stores were doing. in order to find out, they hired three different reviewers to rate 10 local stores. the test statistic was 2.3, what is the p value?
Assuming a two-tailed test with 9 degrees of freedom (10 stores minus 1), the p-value for a t-value of 2.3 is approximately 0.040.
In order to calculate the p-value, we need to know the specific test being used and the significance level of the test. Let's assume that the test is a two-tailed t-test with a significance level of 0.05.
Since the test statistic is 2.3, we need to find the probability of getting a t-value of 2.3 or greater (in absolute value) under the null hypothesis. We can use a t-distribution table or a statistical software to find the corresponding p-value.
Assuming a two-tailed test with 9 degrees of freedom (10 stores minus 1), the p-value for a t-value of 2.3 is approximately 0.040. Therefore, if the significance level of the test is 0.05, we would reject the null hypothesis and conclude that there is a significant difference between the ratings given by the three reviewers.
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Thabo opens an investment account and invest an amount of money at 8. 00% interest per year, compounded monthly. After a number of years, he has accumulated an amount of R 7 365. 00 in the account. The investment earned R2 000. 00 interest in this period. If the accumulated amount is left in the account with the same interest rate, for another period that is one year longer than the first period, the accumulated amount in the account will then be?
The accumulated amount in the account at the end of the second period will be 8,829.71.
We can use the formula for compound interest to solve this problem. The formula is,
A = P(1 + r/n)^(nt)
where A is the accumulated amount, P is the principal (initial amount invested), r is the interest rate (as a decimal), n is the number of times the interest is compounded per year, and t is the time (in years) for which the money is invested.
Let's use this formula to find the initial principal, P
7,365 = P(1 + 0.08/12)^(12*number of years)
We can solve for P by dividing both sides by the right-hand side and simplifying,
P = 7,365 / (1 + 0.08/12)^(12*number of years)
Now we know that the initial principal was P, and it earned R2 000.00 in interest during the first period. Therefore, the accumulated amount at the end of the first period was,
A1 = P + R2 000.00
A1 = P + P(0.08/12)
A1 = P(1 + 0.08/12)
Now, we want to find the accumulated amount at the end of the second period, which is one year longer than the first period. We can use the same formula as before, but with a time of (number of years + 1),
A2 = P(1 + 0.08/12)^(12*(number of years + 1))
We know that A1 = P(1 + 0.08/12), so we can substitute this into the formula for A2,
A2 = A1(1 + 0.08/12)^(12)
A2 = (P(1 + 0.08/12))(1 + 0.08/12)^(12)
A2 = P(1 + 0.08/12)^13
Now we can substitute the expression we found for P earlier,
A2 = (7,365 / (1 + 0.08/12)^(12*number of years))(1 + 0.08/12)^13
A2 = 7,365(1 + 0.08/12)^(12*number of years + 13)
A2 = 7,365(1.007)^((12*number of years) + 13)
A2 = 8,829.71
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A pancake company uses the
function f(x) = 1.5x² to calculate
the number of calories in a
pancake with a diameter of x cm.
What is the average rate of change
for the function over the interval
10
A.) 150 calories per cm of diameter
B.) 33 calories per cm of diameter
C.) 65calories per cm of diameter
D.) 215 calories per cm of diameter
Answer:
To find the average rate of change of the function f(x) = 1.5x² over the interval [10, 11], we need to calculate the change in f(x) over the interval, and divide by the change in x.
The change in f(x) over the interval [10, 11] is:
f(11) - f(10) = (1.511^2) - (1.510^2) = 165 - 150 = 15
The change in x over the interval [10, 11] is:
11 - 10 = 1
Therefore, the average rate of change of the function over the interval [10, 11] is:
(15/1) = 15
This means that for every 1 cm increase in diameter (i.e., for every 1 unit increase in x), the number of calories in the pancake increases by an average of 15 calories per cm of diameter.
Therefore, the answer is (A) 150 calories per cm of diameter.
explain why we call the national halothane study an observational study rather than an experiment, even though it compared the results of using different anesthetics in actual surgery.in order to be an experiment, the subjects would have to be randomly selected from the population. however, these are hospital patients who all have some disease or condition and have not been randomly selected from the population, which includes both healthy and sick people.in order to be an experiment, the treatments (choice of anesthetic) would have to be randomly assigned. instead, a patient's anesthetic is selected by his or her doctor(s).there is not enough information to say for sure, but it is safer to assume that it is only an observational study, so that we are not overconfident about the results.actually, it is an experiment and not an observational study.
We the best reason behind why we call National halothane study is an observational study rather than an experiment is: " In order to be an experiment, the treatments (choice of anesthetic) would have to be randomly assigned." So, option( b) is right one.
We have data from the National Halothane Study that correlates with important research into the safety of anesthetics used in surgery. The above shows the death rate and aesthetic. There is a relationship between the anesthetic used and the death of the patient. The data was collected after that the anesthesia was administered is started. In the observational study, interesting observer in the subjects & any treatment that the subjects recive are beyond the council of the investigators. Here the motion of anaesthesia is anesthetics used her determined by the doctors and the investigators are simply observing. So, it is an observational study due to because in order to be an experiment, the treatments (choice of anesthetic) would have to be randomly assigned. Instead, a patient's anesthetic is selected by his or her doctor(s).
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Complete question:
The National Halothane Study was a major investigation of the safety of anesthetics used in surgery. Records of over 850,000 operations performed in 34 major hospitals showed the following death rates for four common anesthetics:27 Anesthetic A Death rate B CD 1.7% 1.7% 3.4% 1.9% There is a clear association between the anesthetic used and the death rate of patients. Anesthetic C appears dangerous.
a) in order to be an experiment, the subjects would have to be randomly selected from the population. however, these are hospital patients who all have some disease or condition and have not been randomly selected from the population, which includes both healthy and sick people.
b) in order to be an experiment, the treatments (choice of anesthetic) would have to be randomly assigned. instead, a patient's anesthetic is selected by his or her doctor(s).
c) there is not enough information to say for sure, but it is safer to assume that it is only an observational study, so that we are not overconfident about the results.
d) actually, it is an experiment and not an observational study.
Please help offering 15 points!!
Answer: C 70%
Step-by-step explanation:
First you need to add up how many students are participating in the study. 4+6+12+8+4=34. There are 24 people who own more than 5 video games. This means that it is 24/34. This equals about 70%
what is the probability that abby, barry, and sylvia win the first, second, and third prizes, respectively, in a drawing if 200 people enter a contest and winning more than one prize is allowed?
The probability that Abby, Barry, and Sylvia win the first, second, and third prizes, respectively, is 1 in 8,000,000 or 0.0000125%
How to calculate the probability?Assuming that each prize is drawn independently of the others and that any person can win any of the prizes, we can find the probability that Abby, Barry, and Sylvia win the first, second, and third prizes, respectively, by using the multiplication principle of probability.
The probability of Abby winning the first prize is 1/200, since there are 200 people in the contest and only one of them can win the first prize. Similarly, the probability of Barry winning the second prize is also 1/200, and the probability of Sylvia winning the third prize is also 1/200.
Since winning more than one prize is allowed, the probability of all three of these events occurring simultaneously is simply the product of their individual probabilities:
P(Abby wins 1st prize AND Barry wins 2nd prize AND Sylvia wins 3rd prize) = (1/200) * (1/200) * (1/200) = 1/8,000,000
Therefore, the probability that Abby, Barry, and Sylvia win the first, second, and third prizes, respectively, is 1 in 8,000,000 or 0.0000125%
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A survey of 7th and 8th grade student who were asked whether or not they were in favor of or against school uniforms. This two-way table shows the results. How many 7th grade students are against school uniforms?
an appropriations bill passes the u.s. house of representatives with 47 more members voting in favor than against. if all 435 members of the house voted either for or against the bill, how many voted in favor and how many voted against? in favor members against mem
194 member voted against the bill whereas 241 members voted in favour of the bill.
What is bill refers to?A bill usually refers to a piece of paper money, such as a dollar bill or a euro bill.
To solve this problem, we can use algebra. Let's call the number of members who voted against the bill "x". Then, the number of members who voted in favor of the bill would be "x + 47" (since there were 47 more members voting in favor than against).
We know that the total number of members who voted (either for or against) was 435. So, we can write an equation:
x + (x + 47) = 435
Simplifying this equation, we get:
2x + 47 = 435
Subtracting 47 from both sides:
2x = 388
Dividing both sides by 2:
x = 194
So, 194 members voted against the bill, and the number of members who voted in favor would be:
x + 47 = 194 + 47 = 241
Therefore, 241 members voted in favor of the bill.
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Twins Isaac and Isaiah were just born. Isaac weighs
6
66 pounds
2
22 ounces and Isaiah weighs
5
55 pounds
4
44 ounces.
How many ounces do Isaac and Isaiah weigh together?
ounces
Therefore , the solution of the given problem of unitary method comes out to be Isaac and Isaiah are 182 ounces in total.
Definition of a unitary method.Use the tried-and-true fundamental method, the actual variables, and any relevant information gleaned from general and specific questions to complete expression the assignment. Customers may be given another chance to taste the products in response. If these adjustments don't happen, we'll lose out on significant advancements in our understanding of programmes.
Here,
We must first change the weights of Isaac and Isaiah from pounds and ounces to ounces before adding them to determine their combined weight.
Weight of Isaac: six pounds 2 ounces = 6 * 16 + 2
= 96 + 2
= 98 ounces
Isaiah is 5 pounds in weight.
= 5 * 16 + 4
= 80 + 4
= 84 ounces
Together, Isaac and Isaiah weighed
98 ounces + 84 ounces = 182 ounces
As a result, Isaac and Isaiah are 182 ounces in total.
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a rectangular poster is to contain 392 square inches of print. the margins at the top and bottom of the poster are to be 2 inches, and the margins on the left and right are to be 1 inch. what should the dimensions of the poster be so that the least amount of poster is used?
The dimensions of the poster be so that the least amount of poster is used are A = 6L + 4W + 412.
Let the length and width of the printable area of the poster be L and W, respectively. Then, the total dimensions of the poster can be expressed as L + 2(2) and W + 2(1), since there are 2-inch margins at the top and bottom, and 1-inch margins on the left and right.
We know that the area of the printable area of the poster is 392 square inches. Therefore, we can write the equation: LW = 392
We want to minimize the total area of the poster, which is given by:
A = (L + 2(2))(W + 2(1)) = (L + 4)(W + 2)
Expanding this expression, we get:
A = LW + 2L + 4W + 8
Substituting the equation for LW, we get:
A = 392 + 2L + 4W + 8
Simplifying, we get:
A = 2L + 4W + 400
To minimize this expression, we can take the partial derivatives with respect to L and W and set them equal to zero:
[tex]∂A/∂L = 2 = 0 => L = 0[/tex]
[tex]
∂A/∂W = 4 = 0 => W = -100[/tex]
These values do not make sense in the context of the problem. Therefore, we can conclude that the dimensions of the poster that minimize the amount of poster used cannot be found using this method.
Instead, we can use the fact that the printable area of the poster has a fixed area of 392 square inches, and that the margins have fixed dimensions. We can express the area of the poster as:
A = (L + 4)(W + 2) = LW + 4L + 2W + 8
Substituting the equation for LW, we get:
A = 392 + 4L + 2W + 8
Simplifying, we get:
A = 4L + 2W + 400
To minimize this expression, we can again take the partial derivatives with respect to L and W and set them equal to zero:
[tex]∂A/∂L = 4 = 0 => L = 0[/tex]
[tex]∂A/∂W = 2 = 0 => W = -200[/tex]
These values do not make sense in the context of the problem. Therefore, we can conclude that the dimensions of the poster that minimize the amount of poster used cannot be found using this method either.
We can try a different approach. We can use the fact that the printable area of the poster has a fixed area of 392 square inches, and that the total area of the poster is given by:
A = (L + 4)(W + 2) + 2(L + 4) + 2(W + 2)
Expanding this expression, we get:
A = LW + 6L + 4W + 20
Substituting the equation for LW, we get:
A = 392 + 6L + 4W + 20
Simplifying, we get: A = 6L + 4W + 412
To minimize this expression, we can take the partial derivatives with respect to L and W and set them equal to zero:
[tex]∂A/∂L = 6 = 0 => L = -2/3[/tex]
[tex]∂A/∂W = 4 = 0 => W = -3/2[/tex]
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