Answer:
a= mc⁴
b= -C⅗
Step-by-step explanation:
it is what it is
I think its the 1st one, but I'm not sure
$52
Using the equation
y=mx+c
82=7x+c
122=11x+c
11x-7x=122-82
4x=40
x=10
To get c
82=7(10)+c
82-70=c
c=12
For 4 lessons
y=10(4)+12=52