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frez [133]
3 years ago
11

A grocery store chain has been tracking data on the number of shoppers that use coupons. The data shows that 71% of all shoppers

use coupons. 18 times out of 20 these results were considered accurate to within 2.5%. What is the confidence level?
Mathematics
1 answer:
jok3333 [9.3K]3 years ago
4 0
What's the sample size?
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F(x)=3x-2<br>Simplify F(2x)-F(x+2)​
inysia [295]

Answer:

3x - 6

Step-by-step explanation:

To evaluate f(2x) and f(x + 2) substitute x = 2x and x = x + 2 into f(x)

f(2x) = 3(2x) - 2 = 6x - 2

f(x + 2) = 3(x + 2) - 2 = 3x + 6 - 2 = 3x + 4

Thus

f(2x) - f(x + 2)

= 6x - 2 - (3x + 4)

= 6x - 2 - 3x - 4

= 3x - 6

7 0
4 years ago
What's the difference between two whole number 1/2 percent of 36 and 30% of 10<br>​
AlexFokin [52]

Here, we proceed step by step, to obtain our answer,

\frac{1}{2}  % of 36 can be written as ,

0.5 % of 36 , which means,

100 % refers to 36, then

0.5 % refers to what,  thus, by cross multiplication we get,

0.5 % of 36 =  \frac{0.5 X 36}{100} = 0.18 ___(1), which can be expressed in whole numbers as 0.

Now, 30 % of 10 means,

100 % refers to 10, then

30 % refers to what,  thus, by cross multiplication we get,

30 % of 10 = \frac{30 X 10}{100} = 3 __(2)

From equations (1)  and (2),

the whole numbers that we obtain are 0 and 3, respectively,

Thus the difference between these two whole numbers is,

= 3 - 0 = 3.

To know more about  percentage, visit,

brainly.com/question/26497520

#Percentage

5 0
1 year ago
The data below give the number of books checked out of the school library by 15 students during one month. Make a frequency tabl
Alexeev081 [22]
Item | Frequency

0      | 2
1      | 5
2      | 4
3      | 3
5      | 1

Hope I helped!
5 0
3 years ago
Read 2 more answers
Apply the distributive property to factor out the greatest common factor,<br> 60 - 40y =
ASHA 777 [7]

Answer:

GCF = 20

Step-by-step explanation:

he answer would be 20 so then you would get (3-2y) as a final answer

7 0
4 years ago
The quadrilateral shown is a rectangle. What is the measure of CE?
aalyn [17]

Answer:

|CE|=2

Step-by-step explanation:

The quadrilateral is shown in the attachment

Recall that the diagonals of a rectangle are congruent.

This implies that:

|AC|=|BD|

We substitute the expressions to get:

2x-6=5x-21

This is now a linear equation in one variable.

Group similar terms to get:

-6+21=5x-2x

Simplify to get:

15=3x

Divide both sides by 3 to get:

5=x

Recall again that the diagonals of a quadrilateral bisect each other.

|CE|=\frac{1}{2}|AC|

|CE|=\frac{1}{2}|2x-6|

Plug x=5

|CE|=\frac{1}{2}|2*5-6| =10-6=\frac{1}{2}*4=2

3 0
4 years ago
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