Answer:
60
Step-by-step explanation:
Substitute 50 for y in the formula
5x+10y=800
5x+10*50=800
5x+500=800
5x=800-500
5x=300
x=300/5
x=60
The scale factor of dilation is 1/2 or

because the number of rectangle one is multiplied by 1/2 to make rectangle 2
good luck
Answer:
(2x +3) (4x +y)
Step-by-step explanation:
refer the image
I think it would be 8*9+8*16 which would be 72+128= 200