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1. |
What are the first three terms of the arithmetic series if a1 = -1,
an = -115, and Sn = -1160? |
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A. |
-1, -7, -13 |
B. |
20, 14, 8 |
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C. |
-1160, -1166, -1172 |
D. |
-115, -121, -127 |
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Hint |
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2. |
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A. |
10 + 1 + 2 + 3 + 4 + 5; 25 |
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B. |
10 + 20 + 30 + 40 + 50; 150 |
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C. |
11 + 12 + 13 + 14 + 15; 65 |
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D. |
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10; 55 |
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Hint |
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3. |
 |
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A. |
430 |
B. |
860 |
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C. |
838.5 |
D. |
820 |
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Hint |
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4. |
Chavez needs to buy gasoline every week for a year (52 weeks). The first week he spends $10.00. If the amount he spends increases by $0.10 every week, how much will he spend on gasoline this year? |
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A. |
$667.80 |
B. |
$657.80 |
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C. |
$652.60 |
D. |
$572 |
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Hint |
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5. |
Which of the following is not a series? |
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A. |
8 + 2 + 2 + 2 + … |
B. |
5 + 7 + 9 + 11 + … |
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C. |
6 – 3 – 3 – 3 – … |
D. |
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Hint |
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