Answer:
Step-by-step explanation:
e. simplify 3x+9y+2x
here combine like terms. 3x+2x=5x
then add 9y from question. so answer is 5x+9y
f. simplify 7(3x+y)
Expand the form using distributive property.
7(3x+y)= 7(3x)+7(y)
= 21x +7y
g. Factor: 12x+8y
12x=2*2*3*x and 8y= 2*2*2*y
take gcd= 2*2=4
so 12x+8y= 4(3x+2y)
