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1. |
The equation 2x - y + 3z = 5 represents _____________ |
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A. |
a plane. |
B. |
none of these. |
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C. |
a line. |
D. |
a circle. |
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Hint |
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2. |
Three planes can |
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A. |
intersect at one point. |
B. |
All of the choices are true. |
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C. |
intersect in a line. |
D. |
have no points in common. |
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Hint |
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3. |
Solve the system of equations by substitution.
x = z
x - 2y + z = 6
2x + y - 2z = 1
What is the value of x + y + z? |
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A. |
10 |
B. |
9 |
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C. |
11 |
D. |
8 |
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Hint |
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4. |
In 1999 Bob scored 824 points as a college basketball player by hitting 372 of his attempts. If he made 60% of his 200 3-point field goal attempts, how many 1-, 2-, and 3-point field goal baskets did he make? |
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A. |
(212, 40, 120) |
B. |
(120, 40, 212) |
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C. |
(40, 120, 212) |
D. |
(40, 212, 120) |
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Hint |
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5. |
Solve the system of three equations by elimination: 5x + 2y - 3z = 10
2x - 2y + 4z = 6
x - y + 2z = 3
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A. |
no solution |
B. |
(2, -5, 3) |
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C. |
(3, 4, 2) |
D. |
infinite solutions |
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Hint |
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