Answer:
its B.
Step-by-step explanation: just take half off the numbers, and then you have your answer. simple.

The fixed cost is $150, while the per-student cost is $6.
Answer:

Step-by-step explanation:


Volume of rectangular prism = l*w*h

Answer:
W=5.3, l= 15.6
Step-by-step explanation:
Perimeter of a rectangle p=2(l+w)
P= 42
W= x
L= 5+2x therefore 42=2(5+2x+x)
42=10+6x , 32=6x
Make x subject of formula
X=32/6 x=5.3 there for w=5.3
Where L= 5+2x ; L=5+2(5.3)
L therefore = 15.6