Find the solution to the system of equations x + 4y - 5z = -8
x + 4y - 4z = -2
x + 5y - 4z = 3

A. x=2 , y=5 , z=6
B. x=3 , y=14 , z=-12
C. x=4 , y=5 , z=6
D. x=2 , y=4, z=5

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters

Three students, javier, sam, and corrine, participated in a fundraiser where people donated a certain amount of money per lap that the student ran. each student also had some initial donations that were collected before the run. the equations that represent each student's total donation, y, based on the number of laps ran, x, is shown below. match each equation with the correct rate of change for that student.