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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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

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