Question

1. simplify:

a. r·4z
answer ------
b. v + 4v + v + v + v
answer ------

Explanation:

Step1: Combine like terms for part a

Count the coefficients of $z$: $1+1+4=6$, so $z \cdot z \cdot 4z = 6z$

Step2: Combine like terms for part b

Count the coefficients of $v$: $1+4+1+1+1+1=9$, so $v + 4v + v + v + v + v = 9v$

Answer:

a. $6z$
b. $9v$