Solve and check.-7a + 3 + 8a = 9 - 27
A. a = -21
B. a = 39
C. a = 21
D. a = -39
Answer: A
Mathematics
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Solve the problem with estimation, but do not use a calculator. Use rounding to make the resulting calculations simple.If a person earns $19,800 per year, estimate that person's hourly salary.
A. $50 B. $10 C. $40 D. $100
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Draw a sketch to represent the vector. Refer to the vectors pictured here. 
a + d
A. 
B. 
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Factor out the greatest common factor. Simplify the factors, if possible.5t2 - 10t - 25
A. 5(t2 - 10t - 25) B. 5t(t2 - 2t - 5) C. 5(t2 - 2t - 5) D. 5(t2 - 5t - 20)
Mathematics
Solve the formula for the specified variable.d = rt for r
A. r = 
B. r = 
C. r = d - t
D. r = dt
Mathematics