Solve for the specified variable.S = 
for r
A. r = 
- 1
B. r = S - a
C. r = 
D. r = 
Answer: D
Mathematics
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A. 5.26 B. 0.053 C. 0.526 D. 1.9
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Divide.(-30) ÷ (-6)
A. -5 B. -6 C. 5 D. 6
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Solve the problem.During the last four months of a recent year, Annie's Natural Food Store reported the following sales. Find the difference between the sales in December and the sales in November. 
A. $1055 B. $6785 C. $1155 D. $6885
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Simplify the expression by combining like terms.-3x + 9x + 7x
A. 13 + x B. 13 C. 13x D. 6x + 7x
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