Answer:
2(8-d)
Step-by-step explanation:
Because it says 2 times the difference this means the difference will be multiplied by 2. It also says difference which means that 8 and d must be subtracting
2x+4 -3x -15=-2x+4
-1x-11=-2x+4
-11=-1x +4
-15=-1x
15=c
recall that the perimeter is simply the sum of all outer sides of a figure.

Answer:
Step-by-step explanation:
x+5=0
x=-5
-5) 16 80 1 5
| -80 0 -5
____________
| 16 0 1 | 0
quotient=16x²+1
Remainder=0