Answer:
F) y=3x+13
Step-by-step explanation:
y-y1=m(x-x1)
y-(-2)=3(x-(-5))
y+2=3(x+5)
y=3x+15-2
y=3x+13
I might have bought about 9 books
x=55.5
2x=111
Isolate x by dividing both sides by 111
yes, you got it correct