Suppose we must choose 4 rooms out of the 100 rooms in a dormitory. We randomly choose one each out of rooms 1-25,26-50,51-75, and 75-100. This is an example of what? PLEASE HELP!!

do you mean add both of the equations together

because if you do the answer is 10x-5

step-by-step explanation:

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.