Perimeter of a square = 4L
4L = (8x+12)ft
L= (2x+3)ft
Start with

Subtract 15 from both sides:

Divide both sides by 2a:

Answer:
17 units
Step-by-step explanation:
Distance between points
is given by 
The trail starts at P(−2, 2) and goes to Q(5, 2).
Take 
units
It goes from Q to R(5, −5)
Take 
units
It goes from R to S.
Take 
units
units
90 x 10 = 900 is the correct answer
Answer:6/8 ,36/48, 30/40 ,9,12 and etc