Iam have a problem with this math problem x/4= -6 solve for x

Solve the system of equations. y= 2x y= x^2 - 15

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Triangle xyz, with vertices x(-2, 0), y(-2, -1), and z(-5, -2), undergoes a transformation to form triangle x? y? z? , with vertices x? (4, -2), y? (4, -3), and z? (1, -4). the type of transformation that triangle xyz undergoes is a . triangle x? y? z? then undergoes a transformation to form triangle x? y? z? , with vertices x? (4, 2), y? (4, 3), and z? (1, 4). the type of transformation that triangle x? y? z? undergoes is a .