A, 12
Step-by-step explanation:
The line in the middle is a midsegment, making the two triangles similar by a ratio of two. So, dividing 60 by five will give you twelve
94
step-by-step explanation:
average the numbers and use a variable to figure out the minimum to get a 90.
(79+94+91+92+x)/5=90
x = 94