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Snowcat [4.5K]
4 years ago
13

3

Mathematics
1 answer:
kompoz [17]4 years ago
6 0

Answer:

70-14=56     168-56=112

Step-by-step explanation:

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Use the standard deviation values of the two samples to find the standard deviation of the sample mean differences.
larisa86 [58]

The standard deviation of the sample mean differences is 4.854

<h3>How to determine the standard deviation of the sample mean differences?</h3>

The table of values is given as:

<u>Sample      Standard deviation</u>

Red box     3.868

Blue box   2.933

The standard deviation of the sample mean differences is calculated using:

\sigma = \sqrt{\sigma_1^2 + \sigma_2^2}

This gives

\sigma = \sqrt{3.868^2 + 2.933^2}

Evaluate the expression

\sigma = 4.854

Also, the table of value do not give any information regarding the sample size.

This means that the sample size of the session regarding the number of people would purchase the red box and the blue box are unknown

Hence, the standard deviation of the sample mean differences is 4.854

Read more about standard deviation at:

brainly.com/question/15858152

#SPJ1

8 0
3 years ago
A line contains the point (8, –5). If the slope of the line is 5/7 write the equation of the line using point-slope form.
Olin [163]
F(x) = (5/7)x-(75/7)
8 0
4 years ago
Two parallel lines are cut by a transversal, as shown below. Solve for b. Then explain your reasoning.
Svetlanka [38]

Answer:

b = 14

Step-by-step explanation:

Since both angles are diagonal each other, they are equal to each other.

5b = b + 56

-b      -b           (subtract b from both sides)

<u>4b</u> = <u>56</u>

4       4            (divide both sides by 4 to solve for b)

 b = 14

3 0
2 years ago
70 points and i’ll give brainliest!! please answer all the questions on the page! must show work and how you got the answer. ple
Bezzdna [24]

6. One variable only so pretty straightforward.

length-x+4

width-x

x+x+4=80

2x=76

x=38

x+4=42

answer: length 42cm and width 38cm

7. Another money problem!

n-# of nickels

q-# of quarters

n=3+q

0.05n+0.25q=2.85

Substitution works like a charm!

0.05(3+q)+0.25q=2.85

0.15+0.05q+0.25q=2.85

0.3q=2.7

q=9

n=3+q

n=3+9

n=12

answer: 9 nickels and 12 quarters

8. One variable situation again.

Ann's money-2b+9

Betty's money-b

b+2b+9=60

3b=51

b=17

2b+9=43

answer: Ann has $43 and Betty has $17.

9. # of red m&m's-x+1

# of blue m&m's-x

x+1+x=13

x=6

x+1=7

answer: 6 blue and 7 red m&m's

10. a-number of adult tickets

s-number of student tickets

a+s=785 ----> a=785-s

5a+2s=3280

5(785-s)+2s=3280

-3s=-645

s=215

a+s=785

a+215=785

a=570

answer: 215 children tickets and 570 adult tickets

3 0
3 years ago
A volume of a sphere is 407.51 in^3.To the nearest tenth,what is the radius of the sphere?Use 3.14 for Pi. round to the nearest
noname [10]
Volume of a sphere
V= \frac{4}{3} \pi r^3
3 0
4 years ago
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