Solve by elimination. x - 6y = -32-7x - 7y = -21
A. No solution
B. (2, 6)
C. (-3, 6)
D. (-2, 5)
Answer: D
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Find the coordinates of the centroid of the curve.Find the coordinates of the centroid of the curve x = e4t cos 4t, y = e4t sin 4t, 0 ? t ? 
.
A. (
, 
) = 
B. (
, 
) = 
C. (
, 
) = 
D. (
, 
) = 
State whether the scatter diagram shows strong positive correlation, weak positive correlation, strong negative correlation, weak negative correlation, or no correlation. 
A. No correlation B. Strong negative correlation C. Strong positive correlation D. Weak positive correlation E. Weak negative correlation
Reduce the rational expression to lowest terms.
A. 
B. x - 5
C. x + 5
D. 
Solve the problem.For a certain drug, the rate of reaction in appropriate units is given by R'(t) = 
+ 
, where t is measured in hours after the drug is administered. Find the total reaction to the drug from t = 5 to t = 6. Round to two decimal places, if necessary.
A. 16.81 B. 10.44 C. 1.54 D. 20.88