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2 years ago

20 pts to whoever helps!!

Mathematics

2 answers:

VladimirAG [237]2 years ago

7 0

<h3>Answer: B) 31.348</h3>

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Work Shown:

We will never use the alpha = 0.05 value when computing the test statistic. So we can ignore alpha for this particular problem.

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n = 40 is the sample size.

s = 2.6 is the sample standard deviation

$\sigma$ = sigma = 2.9 is the population standard deviation (ie the claimed standard deviation for all the pay phones)

Test Statistic for chi-square

$\chi^2 = \frac{(n-1)*s^2}{\sigma^2}\\\\\chi^2 = \frac{(40-1)*(2.6)^2}{(2.9)^2}\\\\\chi^2 = \frac{39*6.76}{8.41}\\\\\chi^2 = \frac{263.64}{8.41}\\\\\chi^2 \approx 31.3483947681332\\\\\chi^2 \approx 31.348\\\\$

padilas [110]2 years ago

3 0

The answer is B because—MOMMY I WANT CANDY ok sweetie I’ll give you some but Right now— OR ELSE I WILL TELL DADDY YOU CHEATED ON HIM— okay!! After giving my son candy.. DADDY YOU HOME!! Then he whispered “mom cheating on you” he gasped SWEETHEART I WANT A DIVORCE— but I’m busy helping someone on Brainly NOT NOW!!

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N76 [4]

Answer:

x=5

Step-by-step explanation:

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$\frac{x}{30}=\frac{1}{6}$

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$x=\frac{30}{6}$

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3 years ago

X=5 and y=7 for algebraic expression 2(4x-3) + 6(3y-5)

garik1379 [7]

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2 years ago

Read 2 more answers

Choose all the fractions that are in simplest form.<br> 4/26<br> 8/21<br> 6/19<br> 9/10<br> 10/22

dimulka [17.4K]

4/26 can be simplified by 2. So, this is not the answer.
8/21 cannot be simplified. So, it is one of the answers.
6/19 cannot be simplified. So, it is one of the answers.
9/10 cannot be simplified. So, it is one of the answers.
10/22 can be simplified by 2. So, this is not the answer.

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2 years ago

Help solve these please 1.w + 10 = 25

4vir4ik [10]

Answer:

1. w = 15

2. b = 4.8

3. s = 9.7

4. p =15

5. m = -3.2

Step-by-step explanation:

1.w + 10 = 25

we have to find the value of w, so moving 10 from left side to right side

w= 25 - 10

w = 15

2. 7.2 + b = 12

we have to find the value of w, so moving 7.2 from left side to right side

b= 12 - 7.2

b= 4.8

3. 5.3 + s = 15

s= 15 - 5.3

s= 9.7

4.p + (-25) = -10

p-25 = -10

p= -10 + 25

p= 15

3. m + (-1.6) = -4.8

m - 1.6 = -4.8

m = -4.8 + 1.6

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3 years ago

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What is the solution set for the given inequality if the replacement set for r is {5, 6, 7, 8, 9, 10}?

Sophie [7]

Hi there! The answer is B.

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Subtract 6r from both sides.

$- r \leqslant - 8$
Divide both sides of the inequality by -1. Remember that dividing by a negative makes the sign flip.

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Therefore, the solution must be bigger than or equal to 8. From the given solution set, the answer is B. {8, 9, 10}

~ Hope this helps you!

3 0

2 years ago