The answer is A. y=190-7x
K=4.5
X multiplied by 4.5 equals y, meaning the constant of proportionality is 4.5
Answer:
-13x^4+2x^3+8x^2-5x
Step-by-step explanation:
(3x^2-5x-7x^4)-(-2x^3+6x^4-5x^2)
= 3x^2-5x-7x^4+2x^3-6x^4+5x^2
= -13x^4+2x^3+8x^2-5x
15.515 or 15.52 Dollars if rounded.
