Simplify the following rational expression. 100 – 4z^2/ z^2 – 10z+25
Which values of z make the expression undefined?
Choose all answers that apply:
A. z= -5
B. z = -10
C. z = 10
D. z = 5
E. None of the above

astronomers is your final answer! : )

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)