Question

I NEED HELP ASAP PLZZZZ

Answer 1

Step-by-step explanation:

We just subsitue 3 for x and -4 for y, so we get

$3(3) - 5( - 4) = 9 + 20 = 29$

So

$a = 29$

$7(3) + ( - 4) = b$

$21 - 4 = 17$

$b = 17$