Solve the system of equations by the substitution method.
A. (5, -15)
B. (-15, 5)
C. infinite number of solutions
D. no solution
Answer: B
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Find all the local maxima, local minima, and saddle points of the function.
A. f
= 
, local minimum
B. f
= 
, local minimum
C. f(30, 30) = 297,000, local maximum
D. f(0, 0) = 0, saddle point
Solve the matrix equation AX = B for X by finding A-1, given A and B as follows. Use a graphing calculator to obtain your answer, rounding all numbers to four decimal places.A = 
, B = 
A. 
B. 
C. 
D. 
Solve the problem.If the price (in dollars) of a product is given by P(x) = 
+ 2300, where x represents the demand for the product, find the rate of change of price when the demand is 4 units.
A. -$64/unit B. -$256/unit C. $64/unit D. $256/unit
Write the following as a rate in lowest terms.256 miles on 72 gallons
A. 
B. 
C. 
D. 