Solve the equation by first clearing the fractions.- 
r + 2r = 
r + 
A. {0}
B. {18}
C. 
D. 
Answer: B
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Solve the problem.An auxiliary fuel tank for a helicopter is shaped like the surface generated by revolving the curve 
, - 2 ? x ? 2, about the x-axis (dimensions are in feet). If a cubic foot holds 7.481 gallons and the helicopter gets 3 miles to the gallon, how many additional miles will the helicopter be able to fly once the tank is installed (to the nearest mile)?
A. 75 B. 150 C. 50 D. 38
Solve.A cube has a surface area of 6x2 + 108x + 486. Find the length of a side.
A. x - 9 B. x + 9 C. x + 54 D. 6(x + 9)
Use the graph to solve the problem.Find the rate of change in Carlos's weight.
A. -6 pounds per month B. -2 pounds per month C. -4 pounds per month D. -5 pounds per month
Use the given function value(s), and trigonometric identities (including the cofunction identities), to find the indicated trigonometric functions.
?
?
?
A. 
and 
B. ?
and 
C. ?
and 
D. ?
and 
E. ?
and 