again... The sum of two numbers is -20 and the difference of the numbers is 2. What are the two numbers?

-11 and -9

Step-by-step explanation:

-11+-9 is -20

Step-by-step explanation:

Sum means adding. And difference means subtracting. Let x be one of the numbers and y can be the other one. Add them

x + y = -20 And make the other equation by subtracting them

x - y = 2 You can solve this by lining up these two equations one on top of the other, and adding the whole entire equations together.

x + y = -20

x - y = 2 this will get rid of the y. You get 2x = -18. Divide both sides by 2 and get x = -9. Then use either one of the original equations to find the other number, y. So let's use the addition equation: x + y = -20, fill in the -9 for the x and get -9+y= -20 Then add 9 to both sides to get y=-11

So the numbers are -9 and -11

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer