Use the formula for the general term (the nth term) of an arithmetic sequence to find the indicated term of the sequence with the given first term, a1, and common difference, d.Find a21 when a1 = 5, d = 1.
A. - 15
B. 25
C. - 16
D. 26
Answer: B
Mathematics
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Find the area of the shaded region.
A. ? B. ? + 2 C. ? - 2 D. 2
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Solve the problem.If x = 2 cot ?, show that 
= 2 csc ?.
What will be an ideal response?
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Add or subtract as indicated. Make sure that your answer is reasonable by estimating first.8.057 + 1.228
A. -6.829 B. 10.285 C. 6.829 D. 9.285
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Write a numerical expression for the phrase and simplify it.The sum of 23 and -5, divided by the product of 2 and -3
A. 
; - 18
B. 23 + 
; -3
C. 
; -3
D. 
; - 
Mathematics