Factor.x2 + 3x - 70
A. (x - 10)(x + 7)
B. (x + 10)(x - 7)
C. Prime
D. (x - 10)(x + 1)
Answer: B
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The figure shows the velocity v or position s of a body moving along a coordinate line as a function of time t . Use the figure to answer the question. v (ft/sec)
What is the body's acceleration when t = 8 sec?
A. 1 ft/sec2 B. 0 ft/sec2 C. 1.67 ft/sec2 D. -2 ft/sec2
Describe a one-to-one correspondence between the given set and one of its proper subsets. For example, if we gave you the set {3, 5, 7, 9, 11, ...}, the nth term is 2n +1. You could then write the correspondence by matching the elements of {3, 5, 7, 9, 11, ...} with the elements of the subset {5, 7, 9, 11, 13, ...}. The general correspondence would match 2n + 1 with 2n + 3.{6, 8, 10, 12, ...}
A.
| 6, | 8, | 10, | 12, ..., | 2n + 8, | ... |
| ? | ? | ? | ? | ? |
| 8, | 10, | 12, | 14, ..., | 2n + 6, | ... |
B.
| 6, | 8, | 10, | 12, ..., | 2n + 5, | ... |
| ? | ? | ? | ? | ? |
| 8, | 10, | 12, | 14, ..., | 2n + 7, | ... |
C.
| 6, | 8, | 10, | 12, ..., | 2n + 4, | ... |
| ? | ? | ? | ? | ? |
| 8, | 10, | 12, | 14, ..., | 2n + 6, | ... |
D.
| 6, | 8, | 10, | 12, ..., | 2n + 4, | ... |
| ? | ? | ? | ? | ? |
| 7, | 9, | 11, | 13, ..., | 2n + 6, | ... |
The figure shows the velocity v or position s of a body moving along a coordinate line as a function of time t . Use the figure to answer the question. v (ft/sec)
When is the body moving backward?
A. 4 < t < 7 B. 0 < t < 2, 6 < t < 7 C. 0 < t < 4 D. 7 < t < 10
Use a cubic or quartic regression (as specified) to fit a curve through the points given in the table. Round to the nearest hundredth.
(Quartic)
A. y ? -0.01x4 + 0.09x3 - 0.08x2 - 0.23x + 3.23 B. y ? -0.01x4 + 0.29x3 - 0.06x2 - 0.23x + 3.23 C. y ? -0.01x4 + 0.29x3 - 0.16x2 - 0.23x + 2.26 D. y ? 0.01x4 - 0.09x3 - 0.08x2 - 0.23x + 3.23