<span>x2 + 9x + 20
Factor the equation
(x+5) * (x+4)
x = -5
x = -4
</span>
78-30=48 48\6=8 so he brought 8 friends
Answer:
y=-3x-13
Step-by-step explanation:
Plug in the -2 and -4 for the y and x. The slope is the same
1) -4 = -3 (-3)+b
2) -4=9+b
3) -4-9=b
4) -13=b
The equation is y=-3x-13
Simple.....
you have

to find what a is....simplify/multiply both sides....

simplifying it too....
18=7a


Thus, your answer, C.