step-by-step explanation:
cats
relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.
x is the total time in minutes for the free response
you are given number of questions as 15 - m and time per item as 8 minutes
to find x multiply the two givens together:
x = 8 * (15-m) = 8(15-m)