Answer:
a. 4
b. -7
c. -7y+3x+9
Step-by-step explanation:
A. Okay well 5x, 9, -2x, and -7y are the 4 terms.
B. The coefficient (meaning the number attached to the y) is -7
C. Simplified would be finding the common variables; 5x and -2x. Subtract and you get 3x. You can't combine any more of your terms so you are left with -7y+3x+9
