1. add or subtract. show your work for each problem. 20 points each will mark brainiest (10 point for correct answer, 10 points for showing work.) a. (x^2 −4x+5)+(7x^2 +2x−3) b.(7x^2 +4x−6)−(2x^2 −3x+1)

Hi there!

a. 8x^2 - 1
(x^2 - 4x + 5) + (7x^2 + 4x - 6)
= x^2 + 7x^2 - 4x + 4x - 1
= 8x^2 - 1

b. 5x^2 + 7x - 7
(7x^2 + 4x - 6) - (2x^2 - 3x + 1)
= 7x^2 + 4x - 6 - 2x^2 + 3x - 1
= 7x^2 - 2x^2 + 4x + 3x - 6 - 1
= 5x^2 + 7x -7

Hope this helps!

C. 40,320 just did the math right now

He will need 2,898 pieces of paper