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1. |
The cost function for a company to produce x items is y = 22.5 + 2x and the revenue function is y = 2.5x. If the profit is the revenue minus the cost, what is the profit at the break-even point? |
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A. |
$75 |
B. |
$0 |
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C. |
$112.50 |
D. |
$63 |
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Hint |
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2. |
Find the solution of the system y = -3x + 2 and y = -1.5x + 5. |
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A. |
(-1, 5) |
B. |
(-2, 8) |
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C. |
(2, 8) |
D. |
(-3, 9.5) |
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Hint |
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3. |
Solve the system y =  x + 3 and y = x – 1 by graphing. |
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A. |
(8, 7) |
B. |
no solution |
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C. |
(4, 5) |
D. |
(-2, 2) |
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Hint |
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4. |
Solve the system y = x + 1 and y – x = 1 by graphing. |
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A. |
(4, 5) |
B. |
(-1, 0) |
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C. |
no solution |
D. |
coordinates of all points on the graph of y = x + 1 |
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Hint |
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5. |
Solve the system y = x – 3 and y = -2 by substitution. |
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A. |
(-2, -4) |
B. |
(2, -2) |
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C. |
(10, -2) |
D. |
(-2, 2) |
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Hint |
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