Question

1. Aparticular real-life situation yielded the following system:

y = 4x + 3

y = -x - 2

Which of the following points is the solution to this system?

A. ( -1,1)

B. (1, 7)

C. (1, -3)

D. (-1, -1)

Answer 1

4x + 3 = - x - 2
4x + x = -2 - 3
5x = -5
x = -5/5
x = -1

y = 4x + 3
y = 4(-1) + 3
y = -4 + 3
y = -1

solution is (-1,-1)