Answer:
-8x^2-x+5
Step-by-step explanation:
sum equals add
(-3x^2-7x+9)+(-5x^2+6x-4)
add like terms
-3x^2+(-5x^2)= -8x^2
-7x+6x= -x
9+(-4)= 5
there
ok
897/1000
Source: Google
b. 3
3rd and 4th
The only ones to equal 63 (the volume) are the 3rd and 4th
