Answer:
The last one
Step-by-step explanation:
Because it tells you what y is
13.75
Slash and dash. turn the both minuses into positives and add like normal. 6.5 plus 7.25 equals 13.75.
500/6 min if I'm correct
21
width = 7cm
Length= 41cm
width=x
length=3x+20
96=3x+20+3x+20+x+x
96=8x+40
56=8x
x=8
