Answer:
Step-by-step explanation:
help please i need it asap
Answer:
x = 5
Step-by-step explanation:
[tex]\frac{4.5}{7.5}[/tex] = [tex]\frac{3}{x}[/tex]
cross multiply
4.5x = 7.5(3)
4.5x = 22.5
divide
x = 5
g The pH measurements of water specimens from various locations along a given river basin are Normally distributed, with mean 8 and standard deviation 0.3. You take water specimens from four randomly selected locations on this river basin. What is the probability that the mean pH measurement of these four specimens is greater than 8.2
Answer:
0.0918 = 9.18% probability that the mean pH measurement of these four specimens is greater than 8.2
Step-by-step explanation:
To solve this question, we need to understand the normal probability distribution and the central limit theorem.
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
Mean 8 and standard deviation 0.3.
This means that [tex]\mu = 8, \sigma = 0.3[/tex]
Sample of 4:
This means that [tex]n = 4, s = \frac{0.3}{\sqrt{4}} = 0.15[/tex]
What is the probability that the mean pH measurement of these four specimens is greater than 8.2?
This is 1 subtracted by the pvalue of Z when X = 8.2. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{8.2 - 8}{0.15}[/tex]
[tex]Z = 1.33[/tex]
[tex]Z = 1.33[/tex] has a pvalue of 0.9082
1 - 0.9082 = 0.0918
0.0918 = 9.18% probability that the mean pH measurement of these four specimens is greater than 8.2
find the value of x in the Triangle shown below x=?
Answer:
x = 66°
Step-by-step explanation:
unmarked angle = x because it is an isosceles triangle.
The sum of all three interior angles of any triangle = 180°
So:
2x + 58° = 180°
2x = 122°
x = 66°
Solve for x using
multiplication.
cross
X - 2
x3
x + 2
=
4
3
x = [?]
Answer:
x = 14Step-by-step explanation:
[tex] \frac{x - 2}{3} = \frac{x + 2}{4} [/tex]
=> 4(x-2) = 3(x+2) [Cross Multiplication]
=> 4x - 8 = 3x + 6
=> 4x - 3x = 8 + 6
=> x = 14 (Ans)
Use the equation to answer the question . x + 9 + 2x = 3x + 11 How many solutions does the equation have? ОА. Ano solutions O solution c two solutions O infinitely many solutions
Answer:
No solution
Step-by-step explanation:
Add x and 2x.
3x+9=3x+11
Move all terms containing x to the left side of the equation.
Subtract 3x from both sides of the equation.
3x+9−3x=11
Combine the opposite terms in
3x+9−3x.
Subtract 3x from 3x.
0+9=11
Add 0 and 9.
9=11
Since 9≠11, there are no solutions.
Hope it is helpful....Answer:
Answer:
No solution
Step-by-step explanation:
Add x and 2x.
3x+9=3x+11
Move all terms containing x to the left side of the equation.
Subtract 3x from both sides of the equation.
3x+9−3x=11
Combine the opposite terms in
3x+9−3x.
Subtract 3x from 3x.
0+9=11
Add 0 and 9.
9=11
Since 9≠11, there are no solutions.
Hope it is helpful....
diavinad8 and 7 more users found this answer helpful
THANKS
5
5.0
(2 votes)
56
Step-by-step explanation:
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i am pro
The circular opening of a tunnel
has a circumference of 42
meters. Which equation can be
used to find d, the diameter of
the tunnel opening?
Answer:
2(21/pi)=d
Step-by-step explanation:
The formula for a circumference is C=2(pi)(r) in this case we know our circumference is 42 meters so 42=2(pi)(r), we must leave our radius by itself so we divide by 2 to get 21=pi(r) we then also divide by pi which will get us 21/pi=r and we know that the diameter is double of the radius so we just double which will then be 2(21/pi)=d
11 more than a number k equals 29.
HELP ME PLSSSSSSS
Answer:
11+k=29
Step-by-step explanation:
So "more than" means addition.
let's solve this for fun
11 + k =29
k = 29-11
k= 18
Kevin wants to buy a cow but can't afford
the $36 it costs. Later in the year it is at an
affordable $9 and Kevin can buy it. What
percentage of a discount was on the cow?
Answer:
25%
Step-by-step explanation:
Please help very urgent
Answer:
32, 16, 8, 4, 2, 1
Explanation:
The geometric mean can be represented by [tex] \sqrt[n]{x_{1} • x_{2} • x_{3} • .. x_{n}} [/tex].
Which is the mean of the product of n numbers, used to find the average of a geometric progression.
Don't get confused by geometric mean, it is only asking you about the next numbers in the geometric sequence given the first and sixth term.
The explicit rule for a geometric sequence can be modeled by:
[tex] a_{n} = a_{1} • r^{n-1} [/tex]
Where [tex] a_{n} [/tex] is the nth term, [tex] a_{1} [/tex] is the first term in the sequence, n is the term number, and r is the common ratio.
Since we already know the first term, [tex] a_{1} [/tex] will simply be 32.
Since we know it's geometric, there will be an exponential relationship, which means that we will use the geometric mean to find the common ratio.
There are 6 total terms, r is raised to the n – 1 so 6 – 1 = 5, and that will be the degree of this root.
[tex] \sqrt[5]{\frac{a_{6}}{a_{1}}} [/tex] =
[tex] \sqrt[5]{\frac{1}{32}} [/tex] =
[tex] \frac{1}{2} [/tex].
Therefore: [tex] r = \frac{1}{2} [/tex].
Using all the information we have, we can find the explicit rule:
[tex] a_{n} = a_{1} • r^{n-1} [/tex]
[tex] a_{1} [/tex] = 32[tex] r = \frac{1}{2} [/tex][tex] a_{n} = a_{1} • r^{n-1} [/tex] →
[tex] \boxed{a_{n} = 32 • (\frac{1}{2})^{n-1}}[/tex]
________________________________
We can test that this works by substituting the number location of the term you want to find.
For instance:
[tex] a_{1} = 32 • (\frac{1}{2})^{1-1} [/tex]
[tex] a_{1} = 32 • (\frac{1}{2})^{0} [/tex]
[tex] a_{1} = 32 • 1[/tex]
[tex] a_{1} = 32 [/tex]
[tex] a_{6} = 32 • (\frac{1}{2})^{6-1} [/tex]
[tex] a_{6} = 32 • (\frac{1}{2})^{5} [/tex]
[tex] a_{6} = 32 • \frac{1}{32} [/tex]
[tex] a_{6} = 1 [/tex]
pleassse help meeee,
What is the order of the following set of numbers from greatest to least? 1 1/3, 2/3, -1/3. 9/5 O 1/3,2/3,9/5, 1 1/3 -1/3.1 1/3, 2/3, 9/5 09/5, 2/3,1 1/3,-1/3 9/5, 1 1/3, 2/3, -1/3
Answer:
11/3, 9/5, 9/5 , 2/3 , 1/3 , -1/3.1 , -1/3
rectangle has area 80 square centimeters. the rectangle is dilated using A as a center and a scale factor of 1/2 what is the area of the image
9514 1404 393
Answer:
20 square centimeters
Step-by-step explanation:
The area of the dilated figure is the original area multiplied by the square of the dilation factor. The center of dilation is irrelevant.
dilated area = (1/2)² × original area
dilated area = 1/4 × 80 cm²
dilated area = 20 cm²
What is the answer no link I will report and banned you
The following is an estimated demand function: Q = 875 + 6X +15Y − 5P Where Q is quantity sold, X is advertising expenditure (in thousands of dollars), Y is income (in thousands of dollars), and P is the good's price. The R2 was 0.92; the F-statistic was 57; the Standard Error of the Estimate (SEE) is 25. In the above regression: A. income has the highest importance in predicting sales. B. all of the options. C. the regression model is capable of explaining 92% of sales. D. if price increases 10 dollars, the sales will decrease 50.
Answer:
See step by step explanation
Step-by-step explanation:
Q = 875 + 6 * Adv. expenditure + 15* Income - 5 * Product price
A.- As we can see each unitary change (in thousands of $) in Income, will mean an increase of 15 $ (thousands ) in the demand function, the highest impact in Q
C.- The regression model is capable of explaining 92 % of the variation in Q due to the predictors.
D.- If the price is increased by 10 $ demand will decrease in 50
If you are facing South-west, you should turn ______degree anti-clockwise to face North ?
Answer:
You should turn 225 degrees anti-clockwise to face North.
no links please
Given f(x) = 1/2x - 3, what is the value of
f(0)
f(11)
f(21)
Pls Help! Put a proper answer! And do not put a link or I will report you!
Two times the sum of a number, x, and 9 is at most four times the number. Write and solve an inequality to find the value of the number.
Answer:
2(x+9)≤4x
Step-by-step explanation:
2x+18≤4x
-18 -18
2x≤4x-18
-4x -4x
-2x≤18
/-2 /-2
x≥9
Why is buying a house a better investment than renting an apartment?
A. Housing prices increase faster than rents.
B. Mortgage payments increase the homeowner's equity.
C. Leases have higher interest than mortgages
D. Houses are generally larger than apartments,
SIM
Why buying a house is a better investment than renting an apartment is: B. Mortgage payments increase the homeowner's equity.
Why buying a house can tend to be better investment compared to renting an apartment is because of mortgage.
When a person pay for the mortgage, the person debt or loan balance will decrease and on the other hand the person homeowner equity will tend to increase.
Therefore the correct option is B.
Learn more about Why buying a house is a better investment here:https://brainly.com/question/2505246
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I just need help with this is anyone can help I would be happy Thx
Answer:
24 sq cm
Step-by-step explanation:
the big square is 20 and the small one is 4
Write 98 as the product of prime factors.
Write the prime factors in ascending order.
Answer:
2 * 7 * 7 = 98
hope this answer helps you!
eric purchased n notebook. they were 4 dollars each. write an equation to represent the total cost c that eric paid.
Answer:
N = 4
Step-by-step explanation:
expressions below are equi valent? 5(w + 12)=5w + 60 Associative property Commutative property Inverse property Distributive property
You would use the Distributive property to make the left side the same as the right side.
5(w+12) = 5w + 60
Multiply the 5 by each term inside the parenthesis.
5w +60 = 5w +60
William is making a pie. He uses 1/2 cup of blueberries and 2/3 cup of raspberries. What is the total amount of berries in William’s pies? *
1 point
3/5 cup
2/6 cup
one and 1/6 cups
3/6 cup
Helpppp me plzzzzzzz ALSO IM SERIOUS NO FILESSSSSSSS!!!! PLESE SOME ONE HELP ME
Answer:
one and 1/6 cups (1 1/6)
Step-by-step explanation:
2/3 + 1/2
TOTAL means addition.
To add 2/3 and 1/2, we must first find the lowest common denominator (LCD).
The denominator of 2/3 is 3.
The denominator of 1/2 is 2.
Now, we list the multiples of the denominator and find the lowest multiple they have in common.
3: 3, 6, 9, 12, 15
2: 2, 4, 6, 8, 10
The lowest number they have in common is 6.
Second, we change the denominators to 6.
In 2/3, to make 3 into 6, we have to multiply it by 2.
Since we're multiplying the denominator by 2, the numerator will be multiplied by 2 as well.
2/3 x 2/2 = 4/6
Now we do the same for 1/2.
1/2 x 3/3 = 3/6
Now, we add the new fractions.
4/6 + 3/6 = 7/6
7/6 = 1 1/6 (one and 1/6 cups).
Help plsssss What is x
Answer:
X = 8
Step-by-step explanation:
Kindly check the image below for the relationship between two segments in a circle that intersect
A * B = C * D
This relationship is important to understand when trying to solve for x in this type of problem
Now imagine that A = 15 B = x C = 10 and D = 12
Now we want to create an equation
( Using the relationship )
15 * x = 12 * 10
Now we solve for x using basic algebra
12 * 10 = 120
15x = 120
* divide each side by 15 *
15x/15 = x
120 / 15 = 8
we're left with x = 8
a line is parallel to y=3x-2 and intersects the point (3,5)
The equation of the line that is parallel to y = 3x - 2 and intersects the point (3, 5) will be y = 3x - 4.
What is the equation of a parallel line?Let the equation of the line be ax + by + c = 0. Then the equation of the parallel line that is parallel to the line ax + by + c = 0 is given as ax + by + d = 0.
The linear equation is given below.
y = 3x - 2
The equation of the line that is parallel to the line y = 3x - 2 will be given as,
y = 3x + c
The equation passes through (3, 5), then we have
5 = 3(3) + c
5 = 9 + c
c = - 4
Then the equation of the line will be y = 3x - 4.
More about the equation of a parallel line link is given below.
https://brainly.com/question/402319
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What is the Mean Absolute Deviation of the following data set?
{23, 25, 28, 29, 30}
Answer:
The mean absolute deviation is 2.4
Step-by-step explanation:
[tex] \frac{x}{ \sqrt[5]{y} {}^{} {7} } [/tex]
Answer:
Step-by-step explanation:
ANSWER THE QUESTION FOR BRAINLIEST
ANSWER THE QUESTION FOR BRAINLIEST
Answer: these are the y intercepts NOT IN LEAST TO GREATEST ORDER JUST IN THE ORDER OF THE QUSTION
0,7
0,0.7
0,-5
0,2
Step-by-step explanation:
Answer:
these are the y intercepts NOT IN LEAST TO GREATEST ORDER JUST IN THE ORDER OF THE QUSTION
0,7
0,0.7
0,-5
0,2
Step-by-step explanation:
If it’s right I will give Brainlyist
Answer:
its F
Step-by-step explanation:
because 1+1 is AxB is 21
Find the perimeter of the figure.