-1+(-8) is how many units away from 4 on the number line

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

How many terms does the polynomial x^2 y^2 have