What is the result of adding these two equations?

2x + 3y = -5

5x - y = -12

7x+2y=-17

Step-by-step explanation:

We have to add similar terms as follow:

So the result of adding these equatios is:

7x+2y=-17

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2