Answer:
(x) = 
Step-by-step explanation:
let y = f(x) and rearrange making x the subject, that is
y = 5x + 4 ( subtract 4 from both sides )
y - 4 = 5x ( divide both sides by 5 )
= x
change x to
(x) and y back to x, thus
(x) = 
The sales tax is .075 so she would pay 23.65 for the earbuds
I'm calculated and I figure that it's graphing
<u>Answers </u><u>with </u><u>Method</u><u>:-</u>
1) Multiply the length value by 100,000.


2) For this, divide the length value by 1000.


3) For finding the approximate value, just multiply the value of length by 1.609.


4) Multiply the given mass value by 100.


5) Multiply the given value by 10,000.


Answer:
The null and alternative hypotheses are:


Under the null hypothesis, the test statistic is:

Where:
is the sample mean
is the sample standard deviation
is the sample size

Now, the right tailed t critical value at 0.05 significance level for df = n-1 = 10-1 = 9 is:

Since the t statistic is less than the t critical value at 0.05 significance level, therefore,we fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the average phone bill has increased.