Solve.2x2 + 9x = -2 + 15x
A. 
, 
B. 3 + 
, 3 - 
C. -3 + 
, -3 - 
D. 
, 
Answer: D
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For the curve r(t), find an equation for the indicated plane at the given value of t.r(t) = (t - 5)i + (ln(sec t) - 4)j + 10k, -?/2 < t < ?/2; normal plane at t = 8?.
A. x = -8? - 5 B. x = 5 - 8? C. x = 8? + 5 D. x = 8? - 5
Solve the problem.A machine produces open boxes using square sheets of plastic. The machine cuts equal-sized squares measuring 3 inches on a side from each corner of the sheet, and then shapes the plastic into an open box by turning up the sides. If each box must have a volume of 675 cubic inches, find the length of one side of the open box.
A. 15 in. B. 18 in. C. 14 in. D. 21 in.
Factor completely, if possible.n4 - n3 - n + 1
A. (n - 1)2(n2 + n + 1) B. n3(n - 1) - (n - 1) C. n4 - n3 - n + 1 D. n(n3 - 1) - (n3 - 1)
Add or subtract terms whenever possible.y
- 
A. 2y
- 16
B. y
C. -2y
D. (y + 1)