Perform the indicated operation and simplify. Write the answer in the form a + bi.(7 - 3i)(7 - 9i)
A. 22 - 84i
B. 22 + 84i
C. 27i2 - 84i + 49
D. 76 + 42i
Answer: A
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Factor.s10 - t16
A. (s5 - t8)2 B. (s8 - t14)2 C. (s5 + t8)(s5 - t8) D. (s8 + t14)(s8 - t14)
Solve the problem.From a point on a river, two boats are driven in opposite directions, one at 7 miles per hour and the other at 11 miles per hour. In how many hours will they be 36 miles apart?
A. 4 hours B. 3 hours C. 2 hours D. 1 hour
Determine whether the pair of lines is parallel, perpendicular, or neither.y - 5 = - xy - x = 5
A. Parallel B. Perpendicular C. Neither
An object weighing W pounds is suspended from the ceiling by a steel spring (see figure). The weight is pulled downward (positive direction) from its equilibrium position and released. The resulting motion of the weight is described by the function
?
?
where y is the distance (in feet) and t is the time (in seconds).
Use a graphing utility to select the graph of the function.
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?
?
A. ?
B. ?
C. ?
D. ?
E. ?