Solve the equation.
= -13
A. 52
B. 17
C. -17
D. -52
Answer: D
Mathematics
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Use the appropriate formula to find the indicated figurate number.the 18th heptagonal number
A. Hp18 = 837 B. Hp18 = 37.8 C. Hp18 = 783 D. Hp18 = 810
Mathematics
Solve the problem.Without graphing, determine the amplitude and period of the function 
A. Amplitude = 4
Period = 
B. Amplitude = 8
Period = 
C. Amplitude = 4
Period = 
D. Amplitude = 8
Period = ?
Mathematics
Graph the inequality on the number line.x < 
A. 
B. 
C. 
D. 
Mathematics
Use identities to find the indicated value for each angle measure.cos 2? = 
and ? terminates in quadrant III
Find cos ?.
A. cos ? = - 
B. cos ? = - 
C. cos ? = 0
D. cos ? = 
Mathematics