Find the exact value under the given conditions.cos ? = 
, 0 < ? < 
; sin ? = - 
, - 
< ? < 0Find tan(? + ?).
A. 
B. 
C. 
D. 
Answer: D
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Find the equation of the parabola which has the given vertex V, which passes through the given point P, and which has the specified axis of symmetry.V(-4, -1), P(-6, 11), vertical axis of symmetry
A. (y + 4)2 = 
(x + 1)
B. (x + 1)2 = 
(y + 4)
C. (x + 4)2 = 
(y + 1)
D. (y + 1)2 = 
(x + 4)
The matrix associated with the solution to a system of linear equations in x, y, and z is given. Write the solution to the system, if it exists.
A. infinitely many solutions of the form x = -2 - z, y = -5 - 2z, z = z B. infinitely many solutions of the form x = -2 + z, y = -5 + 2z, z = z C. infinitely many solutions of the form x = -2 - z, y = -5 - 2z, z = 0 D. x = -2, y = -5, z = 0
Solve.The number of centimeters, d, that a spring is compressed from its natural, uncompressed position is given by the formula 
where W is the number of joules of work done to move the spring and k is the spring constant. Solve this equation for W. Use the result to determine the work needed to move a spring 9 centimeters if it has a spring constant of 0.4.
A. W = 
B. W = 
C. W = 2d2k
D. W = 
Solve the problem. Use ? ? 3.14.How many cubic feet of grain can be stored in a cylindrical silo with radius 15.4 feet and height 50 feet?Round your answer to the nearest whole number.
A. V ? 2418 ft3 B. V ? 37,234 ft3 C. V ? 4836 ft3 D. V ? 74,468 ft3