Find all real and imaginary solutions.x2 + 7 = 0
A. {
, i
}
B. {±i
}
C. {±
}
D. {
}
Answer: B
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Solve the problem.The position (in centimeters) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. How fast is the object accelerating when it is accelerating the fastest?
A. A cm/sec2
B. A
cm/sec2
C. A2 cm/sec2
D. 
cm/sec2
Use the properties of parallel lines to solve the problem.
is parallel to 
. Find the measure of each numbered angle.
A. ?2 ? ?3, both are 69°; ?1 ? ?ABE, both are 111°. B. ?1 ? ?2, both are 111°; ?3 ? ?ABE, both are 69°. C. ?1 ? ?2, both are 69°; ?3 ? ?ABE, both are 111°. D. ?1 ? ?3, both are 69°; ?2 ? ?ABE, both are 111°.
Evaluate the polynomial.-5x + 8for x = 7
A. -70 B. -27 C. 3 D. -43
Solve the inequality. Graph the solution set and write the solution set in set-builder notation.x2 - 4x - 12 < 0
A. {x|-2 < x < 6}
B. {x|x < -2}
C. {x|x < -2 or x > 6}
D. {x|x > 6}