Add A + B

A: 3x² + 2x - 6

B: x² - 4x + 10

3x² + 2x - 6+(x² - 4x + 10)

3x² + 2x - 6+x²-4x+10

3x²+x²+2x-4x-6+10

4x²-2x+4

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

13

step-by-step explanation:

divide the cost of the total of sodas you bought by the cost of one soda, for example:

$24.57 divided by $1.89 is 13 which means you bought 13 sodas