Please help me I will give you the brain thing and extra points. (image below)

Solve for x, y, and z. show all steps.

Write an inequality for this sentence the quotient of a number and -5 increased by 4 is at most 8

Candice uses the function f(t)=t+100−−−−−−√ to model the number of students in her after-school program. the variable t represents days and f(t) represents the number of students. how many days does it take for there to be 15 students in her program? a. 225 days b. 125 days c. 325 days d. 115 days