Question

Somone please explain how to answer these two questions!

Answer 1

For #9 they want you to add like terms which means you add 3x+2x together and then 3y-7y together. They’re like terms because they have the same variable(letter) so the answer would be C. 5x-4y
In #10 they’re looking for the same thing that you add the like terms (2x+7x) to simplify the equation which makes the answer C. 9x+1

Answer 2

b and c

Explanation:

Like terms are numbers that have the same variable and/or exponent. You can combine them to simplify equations.

3x+2x+3y-7y=5x-4y

3x and 2x are like terms because they share a variable of x. You can add them which gives you 5x. 3y and -7y are also like terms so they can be combined to make -4y.

2x+1+7x=9x+1

2x and 7x are like terms so they can be added for a sum of 9x.