Answer:
78
Step-by-step explanation:
The given functions are:

and



When we plug in x=-5, we get:



Answer: 
Step-by-step explanation:
Hypothesis testing

For this problem, we need to use the t-student distribution to make inference about the data. We calculate the t-statistics as below:

Using a t-statistics table, or using the function TDIST in Microsoft Excel with
with two-tailed distribution, we obtain
.
Distribute the 2 to get the pink box
10x + 2y = 18
Then if we are subtracting the bottom equation from the pink box
10x + 2y = 18
-(10x -7y = -18)
9y = 36
y = 4
-10 + (-9) > 3 + (-25)
-19 > -22
2 hours and 38 minutes.
Hope this Helps! :)