Solve using Cramer's Rule.
A. (-1, 4,-2)
B. (1, -4, -2)
C. (1, 4, -2)
D. (-1, 4, 2)
Answer: C
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What value of x gives the maximum value of 
? Restrict your attention to the horizontal span of 0 to 10. Round your answer to two decimal places.
?
A. 2.86 B. 1.22 C. 4.72 D. 4.74
Evaluate the double integral
?
?
for the given function f(x, y) and the region R.
?
f(x, y) = 2y + x; R is the rectangle defined by 
and 
.
?
A. 
B. 
C. 
D. 26
Solve and give interval notation for the solution set. Then graph the solution set.x + 7 ? - 
or x + 7 ? 
A. 
? 
B. 
C. 
D. 
? 
Solve the problem. Round your answer to the nearest tenth, when appropriate.A ball is thrown downward from a window in a tall building. Its position at time t in seconds is given by 
, where s is in feet. How long will it take the ball to fall 
?
A. 2.6 sec B. 1.4 sec C. 1.6 sec D. 2.4 sec