Answer:
20% profit
Step-by-step explanation:
(1800-1500) / 1500 = 0.2
so 20% profit
Answer:
20% profit
Step-by-step explanation:
Hope this helps
Which of these choices are square roots of 144? Check all that apply.
Answer:
E
Step-by-step explanation:
Decrease $260 in the ratio 3:5
Please help it’s due tonight. Your help will be greatly appreciated.There is also a graph. WILL PUT YOU AS BRAINLY!!!!!!
Answer: see below
Step-by-step explanation:
The shape is a trapezoid
Base 1 (BH) is 10
Base 2 (QA) is 14
Height is 5
Area
[tex]A=\frac{base_{1} +base_{2} }{2} h[/tex]
[tex]A=\frac{10+14}{2} *5\\A=12*5\\A=60[/tex]
Find distance between QB and HA
[tex]D=\sqrt{(x_{2} -x_{1}) ^{2}+(y_{2}-y_{1}) ^{2}[/tex]
Q( -4,4) B (-2,9)
[tex]D=\sqrt{(-2--4)^{2}+(9-4)^{2} } \\D=\sqrt{2^{2} +5^{2} } \\D=\sqrt{29}[/tex]
Perimeter
[tex]P=10+14+2\sqrt{29} \\P=24 +2\sqrt{29} \\P= 24+10.77\\P=34.77[/tex]
Hypotheses: p=.5 vs p NE .5 ; Sample data: p=28/40= .70 with n=40 Round the p-value to three decimal places.
Answer:
hahahahahaha yes hnjoo
The diameter of a circle is 8 centimeters. What is the circle's circumference?
Answer:
25.13 centimeters
Step-by-step explanation:
Classify ∠1 and ∠2 using all names that apply
Step-by-step explanation:
complementry
since the angle 1 and 2 both measures 90⁰
Answer: Choice 2 Adjacent and Choice 4 Supplementary
Step-by-step explanation:
Here, we are given four choices, and I will be defining each of them.
Vertical angles: two angles that are opposite to each other which was formed by two intersecting lines.Adjacent angles: two angles that share one common vertex and "arm"Complementary angles: two angles that add up to 90°Supplementary angles: two angles that add up to 180°-----------------------------------------------------------------------------------------------
We can see from the figure given
Both angles are 90°, so ∠1+∠2=90+90=180°
Which is supplementary.
We can see from the figure given
Both angles share a common arm and vertex
Which is adjacent
Hope this helps!! :)
Please let me know if you have any questions
A mid-size city must decide whether or not to build a new combined bus and train station. To build the new station will require an increase in city taxes. According to a city politician, 70% of all city residents support the tax increase to build a combined bus and train station. An opinion poll of 400 city residents will ask whether they favor a rise in taxes to pay for a combined bus and train station. What is the standard deviation of the distribution of sample proportions?
Answer:
The standard deviation of the distribution of sample proportions is 0.0229.
Step-by-step explanation:
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.
For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean [tex]\mu = p[/tex] and standard deviation [tex]s = \sqrt{\frac{p(1-p)}{n}}[/tex]
70% of all city residents support the tax increase to build a combined bus and train station.
This means that [tex]p = 0.7[/tex]
400 city residents
This means that [tex]n = 400[/tex]
What is the standard deviation of the distribution of sample proportions?
By the Central Limit Theorem:
[tex]s = \sqrt{\frac{p(1-p)}{n}} = \sqrt{\frac{0.7*0.3}{400}} = 0.0229[/tex]
The standard deviation of the distribution of sample proportions is 0.0229.
A gum ball machine has 25 red gum balls, 30 green gum balls, 15 yellow gum balls, and 20 blue gum balls. If Peter puts 1 coin in the machine and gets 1 gum ball, what is the probabllity that the gum ball will not be red?
Answer:
It should be 13/18
Step-by-step explanation:
In a recent survey of 645 working Americans ages 25-34, the average weekly amount spent on lunch as $44.02 with standard deviation $2.81. The weekly amounts are approximately bell-shaped.
a. Estimate the percentage of amounts that were less than $38.40. Round the answer to one decimal place. Approximately % of the amounts were less than $38.40.
b. Estimate the percentage of amounts that are between $41.79 and $47.41.
c. Estimate the percentage of amounts that are at least $38.98.
d. Between what two values will approximately 95% of the amounts be?
Answer:
use photo math it's great and free
Hailey made the following statement
"It is impossible to build a rectangular prism with a volume of 40 units it one side measures 5 units."
Key
represents
1 cubic unit
Select the two figures below that prove Hailey's statement is false
Answer:
D
Step-by-step explanation:
How many lines of symmetry does the figure below have?
Answer:
4
Step-by-step explanation:
straight (1)
horizontal (1)
both diagonals (2)
Find the probability of exactly two
successes in five trials of a binomial
experiment in which the probability of
success is 50%.
Round to the nearest tenth of a
percent.
[? ]%
Answer:
31.3%
Step-by-step explanation:
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
And p is the probability of X happening.
Five trials, probability of a success is 50%.
This means that [tex]n = 5, p = 0.5[/tex]
Probability of exactly two successes
This is P(X = 2). So
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = 2) = C_{5,2}.(0.5)^{2}.(0.5)^{3} = 0.313[/tex]
0.313*100% = 31.3%
The length of a rectangle is five times its width.
If the perimeter of the rectangle is 60 cm, find its length and width.
length: 7 cm
Х
?
width: 1
cm
Answer:
The length of the rectangle is 25 cm, while the width is 5 cm.
Step-by-step explanation:
Given that the length of a rectangle is five times its width, to find its length and width, knowing that the perimeter of the rectangle is 60 cm, the following calculation must be performed:
(5X x 2) + (X x 2) = 60
10X + 2X = 60
12X = 60
X = 60/12
X = 5
5x5 = 25
Thus, the length of the rectangle is 25 cm, while the width is 5 cm.
What is sin(sec^-1 (u))
Answer:
i think
Step-by-step explanation:
PLS HELP !!
G -9 < x < 2
F -9 < x < 2
H -6 < g (x) < 3
J -6 < g (x) < 3
Answer:
-6 <= g < 3
Step-by-step explanation:
-6 <= g < 3
The following data table represents the total cost of a monthly cell phone bill as a function of the number of minutes that the phone is used each month. Minutes 500 750 1,000 1,250 1,500 Total Monthly Cost (in dollars) $62 $77 $92 $107 $122Choose the correct linear model that represents the total monthly cost as a function of time. y = 0.06 x + 500 y = 16 x + 32 y = 62 x + 16 y = 0.06 x + 32
Answer:
the answere is y=543.2
Step-by-step explanation:
thats it
PLEASE HELP !! ILL GIVE BRAINLIEST !!
Answer:
∠TUX and ∠WXU
Step-by-step explanation:
Alternate interior angles are angles that lie on the inside of the parallel lines, but different sides.
∠TUX is on the left side.
∠YXU is on the right side.
Therefore, ∠TXU and ∠WXU are alternate interior angles.
Explain how 17.526 could be rounded to both 18 and 17.5.
Answer:
Step-by-step explanation:
If you round it to the nearest whole number, then 17.526 becomes 18 because if the first digit after the decimal(in this case,5) is 5 or greater you round to the next whole number.
If you round it to the nearest tenth, it would result in 17.5, because if the second digit after the decimal (in this case, 2) is 5 or greater you round to the next tenth of decimal.
Hope this helps!
Answer:
Step-by-step explanation:
It can be rounded down to 17.5 if rounding to 1 decimal place. If you are rounding to the nearest whole number, you would round to 18.
Hope this helps :)
The sum of two numbers is 29. The sum of 3 times the larger and 6 times the smaller is 111. Find the numbers.
Answer:
8 and 21
Step-by-step explanation:
Answer:
The numbers are 21 and 8.
Step-by-step explanation:
Let x be the larger number and y be the smaller number.
According to question,
x + y = 29
or x = 29 - y ........(i)
Also,
3x + 6y = 111
Replacing x from (i), we get,
3(29-y) + 6y = 111
87 - 3y + 6y = 111
3y = 111 - 87
3y = 24
y = 24/3
y = 8
And,
x = 29 - y
= 29 - 8
= 21
Mount McKinley in Alaska is North America’s highest mountain. The mountain is 20,320 feet high. To the nearest mile, find the distance from the summit to the horizon at sea level.
Answer:
4 miles
Step-by-step explanation:
3.8484848 rounded is 4
-7y= -91
I need help!
Answer:
y=13
Step-by-step explanation:
divide each term by -7 and simplify
Answer:
y = 13
Step-by-step explanation:
-7y = -91
y = -91/-7
y = 13
Gift brainliest please D: If you hover over this answer, cllck the crown at the bottom.
help with math please:)
Answer: ben
Step-by-step explanation:
Joey compared the cost of 9 different toys.
$2, $8, $4, $7, $8, $5, $8, $4, $6
What is the median cost of the books?
Question 1 options:
$8
$5
$6
Answer:
6$
Step-by-step explanation:
$2, $8, $4, $7, $8, $5, $8, $4, $6
2, 4, 4, 5,6,7,8,8,8
6$
Please help me! NO sites or links please!
Step-by-step explanation:
it's 13/16
I have done the processs:))
Answer:
D. 13/16
Step-by-step explanation:
D is the correct answer. hope this helps
whats the are and perimeter for this pls help
Answer:
the area is 64 the perimeter is 30
Step-by-step explanation:
What is the measure of n?
Please help!!
Answer:
70°
Step-by-step explanation:
n+20=90° [being a right angelled triangle]
or, n=90°-20°
therefore n=70°
I guess this is the answer but please confirm first.
The average monthly mortgage payment for all homeowners in a city is $2870. Suppose that the distribution of monthly mortgages paid by homeowners in this city follow an approximate normal distribution with a mean of $2870 and a standard deviation of $470. Find to 4 decimal places the probability that the monthly mortgage paid by a randomly selected homeowner from this city is
Answer:
The probability that the monthly mortgage is between 2300 and 3140 is: 0.23167
Step-by-step explanation:
Given
[tex]\mu = 2870[/tex] --- the average
[tex]\sigma = 470[/tex] --- the standard deviation
Required [Missing from the question]
Monthly mortgage is between 2300 and 3140
This is represented as:
[tex]P(2300 < x < 3140)[/tex]
This is calculated as:
[tex]P(a< x < b) = P(z_a < Z < z_b)[/tex]
[tex]P(2300< x < 3140) = P(z_b < Z < z_a)[/tex]
Calculate the z scores
[tex]x = 3140[/tex]
[tex]z = \frac{3140 - 2850}{470}[/tex]
[tex]z = \frac{290}{470}[/tex]
[tex]z = 0.6170[/tex]
[tex]x = 2300[/tex]
[tex]z = \frac{3140 - 2300}{470}[/tex]
[tex]z = \frac{840}{470}[/tex]
[tex]z = 1.7872[/tex]
So, we have;
[tex]P(2300< x < 3140) = P(1.1787 < Z < 0.6170)[/tex]
This is then calculated as:
[tex]P(a < Z < b) = P(Z < a) - P(Z <b)[/tex]
[tex]P(a < Z < b) = P(Z < 1.1782) - P(Z <0.6170)[/tex]
[tex]P(2300< x < 3140) = P(Z < 1.1782) - P(Z <0.6170)[/tex]
Using the z table:
[tex]P(Z<0.6170) =0.73138[/tex]
[tex]P(Z<1.7872) =0.96305[/tex]
[tex]P(2300< x < 3140) = 0.96305 - 0.73138[/tex]
[tex]P(2300< x < 3140) = 0.23167[/tex]
Evaluate 2w2+8, when w=−4.
HELP ASAP
Answer:
-8
Step-by-step explanation:
Plug in -4 for w, 2(-4)2+8 (2x-4x2+8)
2 x -4 x 2 =-16
-16+8= -8
Find the solution set for this inequality. SHOW YOUR WORK OR NO CREDIT
-2x+4>-4x+8
Answer:
Below
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
Inequality Form: x >2
Interval Notation: ( 2, ∞)
Hope this helps:)
pls answer this plssssssssssss
Answer:
Angle C = 160° [given]
Angle A =?
Angle A = Angle C [Vertically Opposite Angles]
Angle A = 160° [option 1]