So I need help, it confuses me a lot.
There's the chart and the answers.

The answer is $0.05.

Step-by-step explanation:

Find the mean, then subtract both the means.

0.54142857142-0.49428571428=x

x=0.047143

If estimated it is 0.05.

$0.20

Step-by-step explanation:

When finding the mean, you add up all the numbers, then divide by how many numbers there are. So you add up all the costs and divide them by 7.

Week 1: 3.3

Week 2: 3.1

Then ofcouse, to find the difference you subtract 3.3 by 3.1 and you get $0.20

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.