Answer:
100 students selected randomly as their enter your middle school in the morning
Step-by-step explanation:
Answer:
C (100 students selected randomly from your middle school)
Step-by-step explanation:
The first one is wrong because its only 10 people from your homeroom.
The next one is also wrong sense its only 5 people who could also share the same interests as you.
The next one is wrong because its not from their middle school
That leaves us with the last one, its selected randomly with a lot of people involved from their middle school.
Unit 1 Cumulative Assessment
Multiple Choice
Let f(x) = x2 and g(x) = x - 6. What is f-g?
a
A. X²-6
B. x2 - 36
O
C. x2 - 12x - 36
D. x2 - 12x + 36
What are the coordinates of the y-intercept of the function y=|6x-5|-4
Answer: (0,1)
Step-by-step explanation:
Hope this helps
What is the product?
-4.2.(-9)
O –72
0 -11
O 72
0 144
A large automobile insurance company selected samples of single and married male policyholders and recorded the number who made an insurance claim over the preceding three-year period.
Single Policyholders Married Policyholders
n1 = 500 n2 = 800
Number making claims = 95 Number making claims = 80
(a) Use a level of significance a = 0.05. Test to determine whether the claim rates differ between single and married male policyholders. Explain your determination.
(b) Provide a 95% confidence interval for the difference between the proportions for the two populations.
Answer:
a
The determination is
There is sufficient to conclude that proportion of the single policy
b
The 95% confidence interval is [tex] 0.0498 < p_1 - p_2 < 0.1302 [/tex]
holders is difference from the proportion of married policy holders
Step-by-step explanation:
From the question we are told that
The sample size for single policy holders is [tex]n_1 = 500[/tex]
The number of single police holders making claim is k = 95
The sample size for married policy holders [tex]n_2 = 800[/tex]
The number of double police holders making claim is u = 80
The level of significance is [tex]\alpha = 0.05[/tex]
Generally the critical value of [tex]\frac{\alpha }{2}[/tex] obtained from the
normal distribution table is
[tex]Z_{\frac{\alpha }{2} } = 1.96[/tex]
The null hypothesis is [tex]H_o : p_1 = p_2[/tex]
The alternative hypothesis is [tex]H_a : p_1 \ne p_2[/tex]
The sample proportion of single police holders making claim is
[tex]\r p_ 1 = \frac{k}{n_1}[/tex]
=> [tex]\r p_ 1 = \frac{95}{500}[/tex]
=> [tex]\r p_ 1 = 0.19[/tex]
The sample proportion of married police holders making claim is
[tex]\r p_ 2 = \frac{u}{n_2}[/tex]
=> [tex]\r p_ 2 = \frac{80}{800}[/tex]
=> [tex]\r p_ 2 = 0.1[/tex]
Generally the pooled sample proportion is mathematically represented as
[tex]\r p = \frac{k + u}{n_1 + n_2}[/tex]
=> [tex]\r p = \frac{95 + 80}{500 + 800}[/tex]
=> [tex]\r p = 0.1346 [/tex]
Generally the test statistics is mathematically represented as
[tex]z = \frac{\r p_1 - \r p_2 }{ \sqrt{ \r p (1 - \r p )* [\frac{1}{n_1} + \frac{1}{n_2} ]} }[/tex]
=> [tex]z = \frac{0.19 - 0.1 }{ \sqrt{0.1346 (1 - 0.1346 )* [\frac{1}{500} + \frac{1}{800} ]} }[/tex]
=>[tex]z = 4.6256 [/tex]
Generally the p-value is mathematically represented as
[tex]p-value = 2* P(Z >4.6256 )[/tex]
From the z table [tex]P(Z >4.6256 ) = 0 [/tex]
[tex]p-value = 2* 0 = 0[/tex]
From the calculation we see that the p-value < [tex]\alpha[/tex] so the null hypothesis is rejected
Hence there is sufficient to conclude that proportion of the single policy holders is difference from the proportion of married policy holders
Generally the standard error is mathematically represented as
[tex]SE = \sqrt{ \frac{\r p_1 (1 -\r p_1)}{n_1} + \frac{\r p_2 (1 -\r p_2)}{n_2} }[/tex]
=> [tex]SE = \sqrt{ \frac{0.19 (1 -0.19)}{500} + \frac{ 0.1 (1 - 0.1)}{800} }[/tex]
=> [tex]SE =0.0205012[/tex]
Generally the margin of error is mathematically represented as
[tex]E = Z_{\frac{\alpha }{2} } * SE[/tex]
=> [tex]E = 1.96 *0.0205012 [/tex]
=> [tex]E = 0.0402035[/tex]
Generally the 95% confidence level is mathematically represented as
[tex]\r p_1 - \r p_2 - E < p_1 - p_2 < \r p_1 - \r p_2 + E[/tex]
=> [tex]0.19 - 0.10 -0.0402035 < p_1 - p_2 < 0.19 - 0.10 + 0.0402035 [/tex]
=> [tex]0.09 -0.0402035 < p_1 - p_2 < 0.09 + 0.0402035 [/tex]
=> [tex] 0.0498 < p_1 - p_2 < 0.1302 [/tex]
Maria studied the traffic trends in India. She found that the number of cars on the road increases by 10% each year. If there were 80 million cars in year 1 of her study, how many more cars were on the road in year 3 compared to year 2?
8,000,000
8,800,000
88,000,000
96,800,000
Answer:
96,800,000
Step-by-step explanation:
10/100 × 80million = 88,000,000
10/100 ×88million = 96,800,000
Answer:
(96,800,000)
Step-by-step explanation:
What is 6(4p - 2) + 2 (5p + 2)
Answer:
34p -8
Step-by-step explanation:
6 (4p- 2) + 2 (5p + 2)
24p - 12 + 2 (5p +2)
24p - 12 + 10p + 4
34p -8
f (x) = 4x + 7. Find the inverse of f(x).
O A. f-1 (x) = -74
OB. f-'(x) = 7 - 4x
O c. f-1(x) = 11
O D. f ? (x) = 4x – 7
Anybody please ? I suck at math !
Answer:
C. f(x) = x - 7 all over 4
Step-by-step explanation:
NB: Let f(x) = y
Exchange X and Y
Make y the subject
f(x) = 4x + 7
y = 4x + 7
x = 4y + 7
x - 7 = 4y
x - 7 all over 4 = 4 ÷ 4
y = x - 7 all over 4
One United Bank is the largest Black-owned bank in the United States which calculates simple interest using the following equation below.
I=prt
Solve the equation for r, the rate balance.
A. Ir=pt
B. Ipt=r
C. rI=pt
D. ptI=r
Answer:
WHat is it :(
Step-by-step explanation:
Answer:
Easy Question: I/pt=r
Step-by-step explanation:
You take the equation i=prt and you solve it out.
You divide the half "prt" by pt like this: prt/pt
You also do that to the other side "I"
You are left with I/pt=r and there it is!!
At the Last Chance Filling Station, gas costs $1.60 a gallon. Trevor paid $32.00 to fill his tank. How many gallons of gas did he buy? a. Write an algebraic equation that represents the scenario. b. Solve to find the solution.
I know it’s 32/1.60=20 gallons
But how do you write the algebraic expression?
Answer:
1.60x=32.00
Step-by-step explanation:
Since you do not how much gallons of gas he bought you would use the variable x.
Answer:
1.60x=32
Step-by-step explanation:
Fill in all the angle measurements
30
60
25
60
30
Answer:
Top left is 90, bottom right is 65.
Step-by-step explanation:
alice sold 3 more than 2 times the number of magazines Josh sold. Alice sold a total of 27 magazines. How many magazines does Josh sell?
Answer: 12
Step-by-step explanation:
you can check this by doing this 12 x 2 = 24 + 3 = 27
What is the retail price of a shirt that has a wholesale price of $12 and is marked up by 60 percent?
$7.20
$19.20
$31.20
$72.00
Answer: 19.20
Step-by-step explanation: What I did was figure out what 10% of 12 was (1.2) then multiplied it by 6 which was 7.2. Then I added that to 12 and got 19.2.
Let me know if this was helpful! :D
Answer:
19.20
Step-by-step explanation:
I just did this and payed attention during the lesson.
A bicyclist rides ⅕ mile in 1/65 hour. Write this as a unit rate.
Answer:
13 ml per hr
Step-by-step explanation:
1/5mi=1/65hr
65/5mi=hr
13mi hr
The bicyclist rides 13 miles per hour
I HOPE THIS WORKS FOR YOU!
Answer:
(1/13)(mile/hour)
Step-by-step explanation:
Simplify this rate of change:
⅕ mile 1 mile
---------------- = --------------- = (1/13)(mile/hour)
(1/65) hour (65/5) hr
help meeeeee please
If it's a rectangle:
perimeter = 2F+10g
Area=g(4F+4g)
Step-by-step explanation:
Perimeter = 2×(l+b)
Area= l×b
I NEED AN ANSWER ASAP (photo)
Answer:
C
Step-by-step explanation:
A, B, and D equal -4, while C equals 4.
A positive number times/divided by a negative number (or vice versa) is a negative number. A negative number times/divided by a negative number (or vice versa) is a positive number.
Write the equation of the line with a slope of 3/4 and a y-intercept of -7 in slope - intercept and point -slope form.
slope intercept:
y=3/4x-7
point slope form:
I used the y intercept (0,-7) as a point to plug into point slope form.
y+7=3/4(x-0)
The linear equation of the line is y = 3/4x - 7 and y + 7 = 3/4(x - 0)
How to determine the line equation?The slope is given as:
m = 3/4
The y-intercept is given as:
c = -7
A linear equation in slope intercept form is represented as:
y = mx + c
So, we have:
y = 3/4x - 7
The equation in point slope form is calculated as follows:
y = 3/4x - 7
Add 7 to both sides
y + 7 = 3/4x
Express 3/4x as 3/4(x)
y + 7 = 3/4(x)
Subtract 0 from x
y + 7 = 3/4(x - 0)
Hence, the linear equation of the line is y = 3/4x - 7 and y + 7 = 3/4(x - 0)
Read more about linear equation at:
https://brainly.com/question/1884491
#SPJ9
Write an equation that represents this comparison sentence.
24 is 4 times as many as 6
Answer:6 x 4 = 24
Step-by-step explanation:
im not sure what was so hard
Answer:
4x6=24 its just you multiply the two smallest numbers
Can someone please help, ty!! (Will mark brainliest)
Step-by-step explanation:
y-1=-4/7*(x-(-4))
7(y-1)=-4(x+4)
7y-7=-4x-16
7y+4x=-16+7=-9
so is the first one
Answer:
7y+4x=-9
Step-by-step explanation:
y=-4/7 x +b
1=-4/7 (-4)+b
b=1-16/7
b=7-16/7
b=-9/7
7y=-4x-9
7y+4x=-9
Walmart is selling 24 bars Gatorade for $8.44 what is the price per bottle
Answer:
About $0.35 per bottle.
Step-by-step explanation:
8.44 / 24 = .3516
Answer:
roughly 35 cents
Step-by-step explanation:
8.44/ 24= .3516
.3516x24= 8.44
Hope this helps. Plz give brainliest.
Please see question below in picture
What is -3.2 + (1 1/2) + (-2)
Answer:
-3.7
Step-by-step explanation:
-3.2 + 1.5 -2 = -3.7
Answer:
-5/2
Step-by-step explanation:
-6+11/2+(-2)
-12+11+(-4)/2
-5/2
6th grade math i mark as brainly
Answer:
Points G and J are correct.
Step-by-step explanation:
a) Isaac and his sister plan to surprise their parents by buying them each a pair of shoes.
They agree that Isaac will pay 68% of the price since he receives a greater
allowance. Use an estimation strategy to determine how much Isaac will pay if the
total bill is $97.65. Show the step-by-step process you used to solve the problem.
THIS IS WHAT I GOT EM I RIGHT OR WRONG !!
$97.65 x .68 = 66.402 (rounded)
Isaac will pay $66.40
Answer:
percentage formula
Step-by-step explanation:
if it is 68% on 97.65 dollar the 97.68x 68%/100
Need help on this ASAPPPPPPPP
Answer:
B
Step-by-step explanation:
We know that the blue triangle is the image as it has the ' on the letters. For example G'.
To first start off, you can look at any points to help solve this problem. I used the point H to help me solve this
Since we know that the black triangle is our old image we know the distance in x values between the black triangle to the blue is -2 as it moves to the left 2 times. (Note: it's going more into the negatives, if it were going to the right it would be positive)
Now we do the same to find our y values, and we see that y value for h on the black triangle goes up +1.
Now we know that the X goes to the left two times to get -2 and that the Y goes up once to get +1.
Hope this helps! :)
Answer:
b. (x - 2, y + 1)
Step-by-step explanation:
You can make that determination visually. However, if you need numbers...
Pick a point on the black triangle, let's say F(0, 0) and the corresponding point on the blue tirangle F(-2, 1)
(y₁ + y₂) / (x₁ + x₂) = (0 + 1) / (0 + (-2)) = 1 / -2
[tex]\frac{rise}{run}[/tex] = [tex]-\frac{1}{2}[/tex]
So, from the F(0,0) position move -2 to the left then up 1 to land on F(-2, 1).
This translated to (x - 2, y + 1)
help me with this question please
Rewrite 1/5 barrel 1/2hour as a unit rate
Answer:5/8
Step-by-step explanation:i took the exam
2. CARS It took Lisa 85 minutes to wash three cars. She spent x minutes on each car and 10 minutes
putting everything away.
Solve 3x + 10 = 85 to find how long it took to wash each car.
(5 Points)
10
25
50/2
50-25
-3x + 31 < 25 can anyone help me do this please
Answer:
x > 2
Step-by-step explanation:
Pull out like factors :
-3x + 6 = -3 • (x - 2)
Divide both sides by -3
Remember to flip the inequality sign:
Solve Basic Inequality :
Add 2 to both sides
x > 2
Answer:
x > 2Step-by-step explanation:
-3x + 31 < 25
subtract -31 from both sides:
-3x + 31 - 31 < 25 - 31
simplify:
-3x < -6
reverser the inequality:
3x > 6 divide 3 on both sides
x > 2
evaluate y 9-(-9) =?
Answer: 18
Step-by-step explanation:
when there is a in front of an expression in parentheses change the sign of each term in the expression. 9+9=18 so ANSWER 18
please solve 2x+3=x−4