Find the domain of the rational expression.f(x) = 
A. {x|x is a real number and x ? 7, x ? 3}
B. 
C. 
D. {x|x is a real number and x ? -7, x ? 3}
Answer: A
Mathematics
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A. 22 B. 42 C. 46 D. 26
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Estimate the sum or difference by first rounding to the nearest ten.693
A. 640 B. 600 C. 650 D. 647
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Find the volume.Find the volume of the solid generated by revolving the area under y = 5e-x in the first quadrant about the y-axis.
A. 10? B. 20? C. 5? D. 1
Mathematics
Solve each equation for y as an expression in x. Then equate the expressions to obtain an equation in the variable x. Finally, solve the equation for the unknown x.y - 3x = 20; y - 2x = 5
A. {-15} B. {25} C. {15} D. {-25}
Mathematics