(x^4)(3x^3-2)(4x^2+5x)
=(3x^7-2x^4)(4x^2+5x)
=12x^9+15x^8-8x^6-10x^5
answer: 12x^9+15x^8-8x^6-10x^5
Answer:
10 1/4
Step-by-step explanation:
Carls age = 12 5/6 - 1 1/3
12 5/6 - 1 1/3
11 (5 - 2) / 6 = 11 3/6
Jane's age = carl's age - 1 1/4
11 3/6 - 1 1/4
10 (12 - 6) / 24 = 10 6/24 = 10 1/4
To solve this, set up a proportion where X is the amount that 120 lawn mowers would cost. It would look like

.
Then cross-multiply to get 40x = 120(4776) or 40x = 573120. Now divide each side by 40 to isolate the variable.
X = 14328.
120 lawn mowers would cost $14,328.
Use the pythagorean theorem.