Simplify the expression. Assume that all variables are positive when they appear.
A. 3x2
B. 147x
C. 7x
D. 7
Answer: C
Mathematics
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For the compound inequality, give the solution set in both interval and graph forms.5x + 7 ? -8 or 5x + 7 ? 16
A. [1.8, ?)
B. [-3, 1.8]
C. (-?, -3]
D. (-?, -3] ? [1.8, ?)
Mathematics
Find the surface area or volume.Use an integral table and a calculator to find to two decimal places the area of the surface generated by revolving the curve 
about the x-axis.
A. 99.99 B. 71.39 C. 58.17 D. 81.81
Mathematics
Evaluate the expression for the given value or values.x - 2yz for x = 90, y = 3, z = 5
A. 420 B. 1320 C. 60 D. 80
Mathematics
Find the unknown value.48% of what number is 84?
A. 0.57 B. 57 C. 175 D. 1750
Mathematics