Evaluate -3^4 a -12 b -81 c 12 d 81

Twelve less than a number is at most 20

I’m still confused on how to work the percentages

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13