Find an expression for the nth term of the arithmetic sequence.20, 30, 40, 50, 60, . . .
A. an = n + 10n
B. an = 10n + 20
C. an = 10n + 10
D. an = 20n
Answer: C
Mathematics
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What will be an ideal response?
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Determine if the statement is a proportion.I. 
II. 
A. I is a proportion, II is not a proportion. B. I is not a proportion, II is a proportion. C. I and II are both proportions. D. Neither I nor II are proportions.
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Find the area.Each square represents one square unit.
A. 40 square units B. 30 square units C. 36 square units D. 34 square units
Mathematics