Question

If 3x−y=12, what is the value of

8x.2y? Explain.

A) 212
B) 44
C) 82
D) The value cannot be determined from the information given.

Answer 1

Explanation:

A)212

Answer 2

A

Explanation:

use the equation x=4+y/3 to find out.

8x + 2y = 24

2y = -8x + 24

y = -4x + 12.....so the slope is -4, and the y int is 12 or (0,12)

to find the x int, sub in 0 for y and solve for x....in either the original equation or the slope intercept equation

8x + 2y = 24

8x + 2(0) = 24

8x = 24

x = 24/8

x = 3.....so the x int is 3 or (3,0)

now plot ur intercepts (3,0) and (0,12)......now start at ur y int (0,12)...and since ur slope is -4, u come down 4 spaces, then to the right 1 space, then down 4, and to the right 1...keep doing this and u should cross the x axis at (3,0)