Simplify the expression by combining like terms, if possible.
(20x - 7) - 
(10x + 6)
A. - 1
B. - 
C. - 
D. 1
Answer: C
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Solve.A rectangular yard has a perimeter of 398. The length is 9 ft more than 4 times the width. Find the width of the yard.
A. Width: 13 ft B. Width: 39 ft C. Width: 38 ft D. Width: 32 ft
Use the product rule, quotient rule, or power rule to expand the logarithmic expression. Wherever possible, evaluate logarithmic expressions.log4
A. 
B. 4
C. - log4x
D. 1 - log4x
Solve the problem.A certain company has found that its expenditure rate per day (in hundreds of dollars) on a certain type of job is given by 
where x is the number of days since the start of the job. Find the expenditure if the job takes 4 days.
A. $3200 B. $80 C. $8000 D. $32
Solve the problem. Use 3.14 for ? and round to the nearest tenth.The discus is thrown from a circular region 8 feet 2 inches in diameter. What is the area of the circle (in square inches)?
A. 7539.1 in2 B. 3769.6 in2 C. 307.7 in2 D. 30,156.6 in2