Answer:
x>-3
Step-by-step explanation:
I used a calculator
Answer:
c = 7
Step-by-step explanation:
The sum means to add c and 9, that is
c + 9 = 16 ( subtract 9 from both sides )
c = 16 - 9 = 7
The inverse for f(x)=2x+4 is f-1(x)= x/2 -2
Answer:
The value of the test statistic is 
Step-by-step explanation:
The null hypothesis is:

The alternate hypotesis is:

Our test statistic is:

In which X is the sample mean,
is the value tested at the null hypothesis,
is the standard deviation and n is the size of the sample.
In this problem, we have that:

Then



The value of the test statistic is 
This is invisible math but a whole bumber cant be converted to a decimal because if you were to see the whoole thing it would be 400.0