In the following equations, what would you multiply the second equation to eliminate the "y"? *(PLEASE I WILL GIVE BRAINLIEST!!)

3x + y = 20
x + y = 12

1) -1

2) 1

3) -3

4) 3

Ineed with angles and the measure of them i have abc a is 65 and b is (3x-10) and c is (2x) find the value of x

Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b