Solve the equation.3r + 4 = 22
A. 15
B. 6
C. 3
D. 19
Answer: B
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Find all the local maxima, local minima, and saddle points of the function.
A. f(0, 0) = 8, saddle point; f(4, 4) = 520, local maximum B. f(0, 0) = 8, test is inconclusive C. f(4, 0) = 8, local minimum; f(0, 4) = 8, local minimum D. f(4, 4) = 520, local maximum
Refer to the figure to answer the question. Line DH is parallel to line IM. Line BO is perpendicular to line DH.
m?IJN is 53°. m?IJN = m?PLM. What is the measure of ?KLP?
A. Cannot be determined B. 53° C. 37° D. 127°
Solve the problem.A bookstore is having a sale. All books included in the sale have a colored sticker on them to indicate the sale price. There are green stickers, red stickers, and orange stickers. Bob, Sue, and Fred each make purchases of books that are on sale. Each row of the table gives information about the numbers of book purchases and the total cost of the purchase (before taxes) . 
Use this information to set up a matrix equation of the form 
which can be solved to determine the price for each type of sale book. Solve this matrix equation to find the price of
a book with a red sticker.Use the fact that for A = 
, A-1 = 
.
A. $6.50
B. $6.87
C. $6.99
D. $6.79
Use a calculator to find the approximate value of the expression rounded to two decimal places.cot 
A. 91.30 B. 1.38 C. 1.26 D. 91.18