Use the Half-angle Formulas to find the exact value of the trigonometric function. tan 
A. 1 + 
B. -1 - 
C. -1 + 
D. 1 - 
Answer: D
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Find the volume under the surface z = f(x,y) and above the rectangle with the given boundaries.z = 8x + 4y + 7; 0 ? x ? 1, 1 ? y ? 3
A. 28 B. 26 C. 36 D. 38
Use a graphing calculator to solve the system of equations. Round your solutions to one decimal place.1.7x + 12.6y - 4.7z = 1.95.0x - 7.0y - 1.2z = -4.83.1x + 4.0y - 3.5z = 11.8
A. {(-94.5, -40.1, -143.3)} B. {(-34.6, -14.7, -52.4)} C. {(-23.0, -9.8, -35.0)} D. {(57.6, 24.4, 87.4)}
Solve the problem.If three cards are drawn without replacement from an ordinary deck, find the probability that the third card is a heart, given that the first two cards were hearts.
A. 
B. 
C. 
D. 
The graph shows sales in thousands of dollars for 1989 and 1990. Use it to answer the question. 
What does the ordered pair (10, 48) for 2006 mean in the context of this graph?
What will be an ideal response?