Answer:
Step-by-step explanation:

Combine like terms. 1/4 and 7/8 are like terms and LCD of 4 and 8 is 8
9/10y and -3/5y are like terms and LCD of 10 , 5 is 10

Answer:
12a^6b^3 you multiply 4 and 3 to get 12,then you factor out the algebra with the common terms.
Answer:
3x+3
Step-by-step explanation:
add up x-3,x+6 and x
combine like terms
x+x+x-3+6=3x+3
Answer:
D. y=3x+4
This is the correct answer