Answer:
a is 4x (the second one only)
b is 4 * 9y-4 * 5 and 4(9y-5) (the first and last one)
Step-by-step explanation:
a: x+x+x+x=4x
b: 4 * 9y=36y and -4 * 5=-20
(and 4 * -5 also equals -20)
here is the first one 4x
1. 4x
2. 4(9y-5)
for the second one 4(9y−5)
I worked hard lol so pls mark
