Answer:
Step-by-step explanation:
Daniel has pulled 4 brown out of 14.
The number of marbles doubled, so the number of brown is expected to double:
Just do what you said (subsitute) and solve
x=number of classes
7.5x=5.5x+10
subtract 5.5x from both sides
2x=10
divide 2
x=5
5 classes
to find how much it costs, subsitute 5 for x in any equation
y=7.5(5)
y=37.5
total cost is $37.5 per month
Step-by-step explanation:
when y is 0 x is 2 and 4
(2,0) (4,0)