Answer:
Option D. 50 ft
Step-by-step explanation:
we know that
The area of the figure is equal to the area of three rectangles
so


Remember that the area is given

so

solve for x

Answer:
The amount of money A pays is 
Step-by-step explanation:
Let
x-----> amount of money A pays
y-----> amount of money B pays
we know that
------> equation A

so
------> equation B
substitute equation B in equation A and solve for x

Answer: (5, 12)
Step-by-step explanation:
Just graph the linear equations and find where they intersect.
Algebraically, you can set them equal to each other
-3x-3=2x+2
-x-3=2
-x=5
x=5
Plug x=5 to any equation
y=2(5)+2
y=12
Answer:
8859.5
Step-by-step explanation:
if it decreases with 35% then after each year it is worth only 75% of its previous value. so after one year it is worth 75%*21000=15750. the next year it is 75%*15750=11812.2. and after the 3rd year itnis worth 75%*11812.2=8859.5