Answer:
24 cars
Step-by-step explanation:
1 hour = 3 * 20 minutes
which means he can service 3 cars in an hour
for 8 hours:
8 hours * 3 cars = 24 cars
: he can service 24 cars in an 8 hour work day.
You can solve the pair of equations graphically by finding where the two lines intersect/meet. The point where they intersect is the solution to both of the equations.
Slope-intercept form: y = mx + b
(m is the slope, b is the y-intercept, or the point where x = 0 ---> (0 , y))
y = 7x - 9
m = 7
y-intercept = -9 -----> (0, -9)
y = 3x - 1
m = 3
y-intercept = -1 ------> (0, -1)
I'm not really sure what the last sentence of the question is asking, so you could clarify the question if you need help
X/7= 3
⇒ x= 3*7
⇒ x= 21
x/7= 20
⇒ x= 20*7
⇒ x= 140
x/7= 21
⇒ x= 21*7
⇒ x= 147
x/7= 22
⇒ x= 22*7
⇒ x= 154
Hope this helps~