Solve the problem.If 4 is subtracted from a number and this difference is doubled, the result is 5 more than the number. Find the number.
A. 13
B. 4
C. -4
D. -13
Answer: A
Mathematics
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Solve the logarithmic equation symbolically.log x8 = 7 + 2 log x
A. x = 8109
B. x = 109/8
C. x = 
D. x = 107/6
Mathematics
Write the decimal as a percent.0.096
A. 96% B. 9.6% C. 0.096% D. 0.96%
Mathematics
Solve the problem.Assume that the sales of a certain appliance dealer are approximated by a linear function. Suppose that sales were $14,000 in 1982 and $77,500 in 1987. Let 
represent 1982. Find the equation giving yearly sales 
.
A. S(x) = 12,700x + 77,500 B. S(x) = 63,500x + 77,500 C. S(x) = 12,700x + 14,000 D. S(x) = 63,500x + 14,000
Mathematics
Given the values of x and y, find an equation of variation in which y varies directly as x.y = 2.8, when x = 1.6
A. y = 2.8x
B. y = 
x
C. y = 
D. y = 1.75x
Mathematics