Answer:
D
Step-by-step explanation:
You can look at it like a right triangle being made with the vertical part being 9 and the horizontal part being 8, then you want to find the diagonal part. So that's the Pythagorean theorem
4x^2-9
=(2x)^2 -3^2
=(2x+3) (2x-3)
Hope this helps you.
75 pounds
(x) + (x) + (x+20) = 185
3x + 20 = 185
3x = 165
x = 55
Large dog = 55 + 20 = 75
7 and the corresponding angle theorem
it's a trinomial