Evaluate the expression using the given value of the variables.-2x2 + 5y2 for x = 2, y = 3
A. 41
B. -53
C. 37
D. 7
Answer: C
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Find the linearization L(x) of f(x) at x = a.f(x) = 
, a = 0
A. L(x) = - 
x
B. L(x) = - 
x
C. L(x) = 
x
D. L(x) = 
x
The following table shows the length L, in inches, and the flying speed S, in feet per second, of certain flying animals. L 0.51 3.46 4.82 47.13 62.78 S 21.87 36.38 39.86 61.72 74.86Use power regression to answer the following question. If the length is halved, how is the flying speed affected? Round your answer to two decimal places. ?
A. It is multiplied by 0.49. B. It is multiplied by 2.01. C. It is multiplied by 0.50. D. It is multiplied by 0.85.
Solve the system of equations by substitution, if a solution exists.
A. x = 
, y = 
B. Many solutions
C. x = 
, y = 
D. No solution
Solve.The time T necessary to make an enlargement of a photo negative is directly proportional to the area A of the enlargement. If 24 seconds are required to make a 3-by-4 enlargement, find the time required for a 4-by-9 enlargement.
A. 144 sec B. 36 sec C. 72 sec D. 108 sec