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1 | | Which of the following correctly solves the system of linear equations shown? (2.0K) |
| | A) | (40.0K)
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| | B) | (40.0K)
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| | C) | (40.0K)
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| | D) | (39.0K)
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2 | | Elimination is the best method for solving the linear system (2.0K)
because: |
| | A) | …elimination is always the best method for solving linear systems. |
| | B) | …the coefficients are too large to solve the system any other way. |
| | C) | …neither x nor y are isolated in the equations, and the coefficients of y are multiples of each other. |
| | D) | …the graphs of the lines could not easily fit onto a sheet of graph paper. |
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3 | | To eliminate the y terms in the system (2.0K)
you would have to: |
| | A) | …add twice the first equation to the second. |
| | B) | …subtract twice the second equation from the first. |
| | C) | …add the two equations. |
| | D) | …subtract the second equation from the first. |
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4 | | Solve the system using any method: (2.0K) |
| | A) | (x, y) = (−2, 7) |
| | B) | (x, y) = (4, 5) |
| | C) | (x, y) = (−2, −7) |
| | D) | (x, y) = (5, 4) |
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5 | | Solve the system using any method: (2.0K) |
| | A) | (2.0K) |
| | B) | (1.0K) |
| | C) | (2.0K) |
| | D) | (1.0K) |
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6 | | Solve the system using any method: (2.0K) |
| | A) | (x, y) = (2, −1) |
| | B) | (2.0K) |
| | C) | (x, y) = (7, −3) |
| | D) | (2.0K) |
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7 | | Gregor drove 860 km in 9 h. Part of the way he drove at 100 km/h; the rest of the way he drove at 80 km/h. How far did he drive at 100 km/h? |
| | A) | 60 km |
| | B) | 160 km |
| | C) | 700 km |
| | D) | 800 km |
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8 | | Kim’s class wants to buy class rings for graduation. The cost of the rings is $500 plus $22 per ring. If they charge $47 per ring, how many rings will Kim’s class need to sell to break even? |
| | A) | 11 rings |
| | B) | 12 rings |
| | C) | 20 rings |
| | D) | 23 rings |
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9 | | Adam is saving for university. He has $10 000, of which some is in a savings account earning 5% per year and the rest is in a GIC earning 7% a year. If Adam earned $554 in interest last year in total, how much was invested in his GIC? |
| | A) | $2700 |
| | B) | $4600 |
| | C) | $5400 |
| | D) | $7300 |
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10 | | Anne is a third as old as her mother. Ten years from now, Anne will be half as old as her mother. How old is Anne now? |
| | A) | 40 years old |
| | B) | 30 years old |
| | C) | 20 years old |
| | D) | 10 years old |
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