I might be wrong but I think the answer would be -x+2x+6 as a simplified version because if you use the equation (x+4•x+3)-3x(x+1)=a (or any letter you choose), you will get 3x+x^2+12+4x-3x-3x^2=y. Then, you can combine like terms:
4x-2x+12=a
Answer:
9,000 feet per minute
Step-by-step explanation:
C because 9 x 12 is 108 and so it’s c but I’m sorry if this is wrong
(x^2 +3)(5x+9)
5x^3 + 9x^2 + 15x + 27
