Solve the inequality and graph the solution set.10x + 2 > 2(4x + 2)
A. {x|x < 1} or (-?, 1)
B. {x|x > 10} or (10, ?)
C. {x|x < 10} or (-?, 10)
D. {x|x > 1} or (1, ?)
Answer: D
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Solve the problems.A discount store had monthly sales of $103,400 and spent 22% of it on advertising. How much was spent on advertising?
A. $22,748 B. $227,480 C. $47,000 D. $470,000
Describe the graph of the polar equation.r = 
A. Line with slope 9 and y-intercept (0, -8) B. Ellipse centered at origin with intercepts (±8, 0) and (0, ±1) C. Hyperbola passing through (9, 8) D. Line with slope 8 and y-intercept (0, -9)
Find the constant of proportionality k, and write the linear function relating the two variables.Suppose that Q varies directly with x and inversely with y. When Q = 3, x = 45 and y = 135.
A. k = 9; Q = 
B. k = 9; Q = 
C. k = 
; Q = 
D. k = 15; Q = 
Sketch the graph of the polar equation.r = 
A. 
B. 
C. 
D. 