Solve the system by graphing -3y -y=-10 , 4x-4y=8

y = 2.5

x = 4.5

Step-by-step explanation:

-3y-y= -10

-4y= -10

y = -10/-4 (the minus sign cancels out)

y = 2.5

4x-4y=8 (since y = 2.5)

4x-4 (2.5) = 8

4x-10=8

4x=8+10

4x=18

x=18/4

x=4.5

The area of the new rectangular picture is = 96in2

Step-by-step explanation:

Kerry wants to enlarge an old rectangular picture to make both the length and width 2 times as large as they were originally. The area of the original picture is 24in2.

Length of the original rectangular picture × width of the original rectangular picture = 24in2

To make a new one that is 2 times the original one, it becomes

Let the area of the new rectangular picture be y.

Area of the original rectangular picture with Length,L and width,W becomes

L×W =24

LW=24

Area of the new rectangular picture with Length,2L and width,2W becomes

2L×2W = y

4LW = y

Substituting LW=24 into 4LW = y

24×4 = y

y= 96in2