Answer:
x=23/10
Step-by-step explanation:
the dash is a fraction
y = 3
find out the slope
m = (3-3)/(4-7)
m = 0
so the line is horizontal
passing through the point (x,3)
x can be any value
so the equation is
30/2+8
30/2=15
15+8=23
she finished with $23
B)