Answer:
-10
Step-by-step explanation:
5ab-4bc+8ab+9=
1) 5ab+8ab=13ab
2) 13ab-4bc=b(13a-4c)
3) b(13a-4c)+9= (-1)( 13×3-4×5)+9= -19+9= -10
here u go.
hope it helps you
The answer is 270.
18 miles per gallon
times
15 gallons
equals
270
you're welcome.
b
