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Ira Lisetskai [31]
3 years ago
11

20. Use the Distributive Property to find another expression for 3(2x + 7)

Mathematics
1 answer:
ASHA 777 [7]3 years ago
7 0

Answer:

D

Step-by-step explanation:

3×2x=6x

3×7=21

So your answer is D

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A store owner notes that 1 out of 4 customers do not make a purchase. How many customers need to come into the store in order fo
OverLord2011 [107]

Answer:

340 customers.

Step-by-step explanation:

1 out of 4 = 25% purchase rate

85 × 4 = 340

To check our work:

25% of 340 = 0.25 × 340 = 85

4 0
3 years ago
It takes Mia 49 minutes to complete 14 homework problems on average, how long did it take to solve each problem
hoa [83]

Answer: 3.5 minutes per problem

Step-by-step explanation: To find the average divide 49 by 14 to get 3.5.

6 0
3 years ago
You are testing the claim that the proportion of men who own cats is significantly different than the proportion of women who ow
otez555 [7]

Answer:

Step-by-step explanation:

This is a test of 2 population proportions. Let 1 and 2 be the subscript for the men and women who own cats respectively. The population proportion of men and women who own cats would be p1 and p2 respectively.

p1 - p2 = difference in the proportion of men and women who own cats.

The null hypothesis is

H0 : p1 = p2

p1 - p2 = 0

The alternative hypothesis is

Ha : p1 ≠ p2

p1 - p2 ≠ 0

it is a two tailed test

Sample proportion = x/n

Where

x represents number of success

n represents number of samples

For men

n1 = 80

p1 = 55/100 = 0.55

x1 = p1n1 = 0.55 × 80 = 44

For women,

n2 = 100

p2 = 30/100 = 0.3

x2 = p2n2 = 0.3 × 100 = 30

The pooled proportion, pc is

pc = (x1 + x2)/(n1 + n2)

pc = (44 + 30)/(80 + 100) = 0.41

1 - pc = 1 - 0.41 = 0.59

z = (p1 - p2)/√pc(1 - pc)(1/n1 + 1/n2)

z = (0.55 - 0.3)/√(0.41)(0.59)(1/80 + 1/100) = 3.39

Test statistic = 3.39

5 0
3 years ago
Hector enters a competition to guess how many stuffed animals are in a box. Hector’s guess is 35 stuffed animals. The actual num
qwelly [4]

Answer:20%

Step-by-step explanation:Based on the given conditions, formulate:( 35 - 28 ) divided by 35

Calculate the sum or difference: 7/ 35

Cross out the common factor: 1/5

Multiply a number to both the numerator and the denominator: 1/5 x 20/20

Write as a single fraction: 20/5x20

Calculate the product or quotient:20/100

5 0
3 years ago
10. If x = -2, y=-6 and z= 4, find the value of 4xy<br>Z​
Grace [21]

Answer:

192

Step-by-step explanation:

Given

4xyz ← substitute given values into expression

= 4 × - 2 × - 6 × 4 = - 8 × - 24 = 192

5 0
3 years ago
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