Answer:
y=x-2
Step-by-step explanation:
If you have drawn the graph of
.
To determine the equation of the line which should be drawn to solve the equation: x² - 4x +3=0
Simply carry out the subtraction: 

The equation of the line which should be drawn is: y=x-2
What this means is simply:
If

They are both equal. 96/12=8
And 8x12=96.
Hope that helped!
Answer:
y = -5
Step-by-step explanation:
Isolate y:
-3x + 9y = -57
9y = -57 + 3x
y = (-57/9) + (3/9)x
Substitute for x:
y = (-57/9) + (3/9)(4)
y = (-57/9) + (12/9)
y = (-45/9)
y = -5
He should have $5.25 left to spend on a card.
Hope This Helps! :3