Identify the x-intercept of the linear equation 3x + y - 9 = 0

A) (3,0)
B) (-9,0)
C) (-3,0)
D) (9,0)

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

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?