Simplify the expression. Assume that all variables are positive when they appear.
? 
A. -20x
B. 20x
C. -1x
D. 9x
Answer: B
Mathematics
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Solve for x.3x = 81
A. {4} B. {27} C. {3} D. {5}
Mathematics
Graph the solution of the inequality on a number line.x ? -3
A. 
B. 
C. 
D. 
Mathematics
Factor completely.x4 + 4x3 - 77x2
A. x2(x + 11)(x - 7) B. x2(x - 11)(x + 7) C. (x3 + 7)(x - 11) D. (x3 + 11)(x - 7)
Mathematics
Solve the problem.Suppose the sales of a particular brand of appliance satisfy the relationship 
where y represents the number of sales in year x, with 
corresponding to 2010. Find the number of sales expected in 2022 if this trend continues.
A. 2620 B. 5080 C. 2460 D. 5240
Mathematics