In the following equations, what would you multiply the second equation to eliminate the "y"? *(PLEASE I REALLY NEED HELP!!D:)

3x + y = 20
x + y = 12

1) -1

2) 1

3) -3

4) 3

To which set of numbers does the number –5 belong? select all that apply. integers natural numbers rational numbers real numbers whole numbers

16. you're planning to buy a boat, a motor, and some miscellaneous boating equipment. the boat costs $325, the motor costs $225, and the equipment costs $79. if you've saved $438 toward these purchases, how much more do you need to save? a. $181 b. $281 c. $291 d. $191

Which expression is not a polynomial?