Review 8.1.1 – 8.1.5
DUE4/17/15
Name: __________________________Class Period: __
8.1.1
1. Is the ordered pair a solution to the system of equations?
2x + 2y = 14
(6, 8)
x–y=-1
2. Is the ordered pair a solution to the system of equations?
2x + y = 4
(1, 2)
2x – 3y = - 4
3. Is the ordered pair a solution to the system of equations?
5x – 4y = 20
3y = 2x + 1
8.1.2
4. Solve by SUBSTITUTION
y = 3x
x + 2y = 8
5. Solve by SUBSTITUTION
x = 3y
y – 2x = 6
6. Solve by SUBSTITUTION
x–y=8
x+y=2
(8, 5)
8.1.3
8.1.4
7. Solve by ELIMINATION
x+y=8
10. Solve by EITHER method.
x–y=0
8. Solve by ELIMINATION
x+y=8
2x – 8y = 30
11. Solve by EITHER method.
x – 2y = 2
9. Solve by ELIMINATION
2x – 5y = 11
3x + 2y = 7
x – 4y = 15
x+y=8
x + y = 100
12. Solve by EITHER method.
x+y=9
x–y=1
8.1.5
13. A company is producing running shoes. The fixed costs will be $300,000 and it costs $30 per pair of shoes. Each pair
will be sold for $60.
A) Write the cost function producing x pairs
B) Write the revenue function from selling x pairs
C) Determine the break-even point
D) Determine the profit of producing and selling 8000 pairs