Answer:

» 3y - 9 is equivalent to 3(y - 3)
This is known as "5 take 3", where ordering is not important.

Answer:
The correct answer is A:-3a^3+2a
(Btw that’s not 50 points, imma solve this for you because you’re desperate)
Using the Pythagorean theorem:
c^2 = a^2 + b^2
c^2 = 4^2 + 7^2
c^2 = 16 + 49
c^2 = 65
c = 8.1