Use the quadratic formula to solve the quadratic equation.x2 + 2x - 99 = 0
A. x = -11, 1
B. x = -11, 9
C. x = 11, 9
D. x = 11, -9
Answer: B
Mathematics
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A. 
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Subtract.
A. 1510 B. 1530 C. 1540 D. 540
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Find the velocity vector in terms of ur and u?.r = 2 cos 2t and ? = 4t
A. v = (-2 sin 2t)ur + 8cos 2tu? B. v = (-4 sin 2t)ur + 8cos 2tu? C. v = (-8 sin 4t)ur + 4cos 4tu? D. v = (4 sin 2t)ur + 8cos 2tu?
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Solve the problem.The cost of tiling the floor in a rectangular room varies jointly as the width and length of the room. If a room with width 9 feet and length 12 feet costs $160.92 to tile, find the cost to tile the floor of a room with width 14 feet and length 27 feet.
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