Answer: i think true
Step-by-step explanation:
Answer:
-21 r^5
Step-by-step explanation:
(7r) (-3r^4)
Multiply the coefficients
7*(-3)
-21
Multiply the variables
r * r^4 = r^(4+1) = r^5
-21 r^5
Answer:
A
Step-by-step explanation:
N=54........................
Answer:
k=3
Step-by-step explanation: