16. would be C since they both consist of the same variable to the same power
17. x-2x+7-9+4x
c. 3x-2
18. -4(3a-5). You would multiply -4 by 3 a, and -4 by -5. It turns to
-4(3a)-4(-5)
a. -12a+20
https://www.skillsyouneed.com/num/percent-change.html
Answer:
Yes it does
Sorry I need 20 characters so 2+2=4 there you go
4/6=2/3 (divide both numerator and denominator by 2 (gcd)).
Hope this helps.
