Solve the problem.How many liters of a 20%-alcohol solution must be mixed with 70 liters of a solution that is 70% alcohol to get a solution that is 40% alcohol?
A. 17.5 L
B. 105 L
C. 10.5 L
D. 175 L
Answer: B
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Find the value.If F(x, y) = ex sinh y, find Fx(-2, 0) and Fy(-2, 0).
A. Fx(-2, 0) = e-2, Fy(-2, 0) = 0 B. Fx(-2, 0) = e-2, Fy(-2, 0) = e-2 C. Fx(-2, 0) = 0, Fy(-2, 0) = 0 D. Fx(-2, 0) = 0, Fy(-2, 0) = e-2
Use the order of operations to evaluate the expression.
A. 
B. 
C. 3
D. 
Classify the system as independent, inconsistent, or dependent. 2x - y = 5-4x + 2y = -18
A. Independent B. Dependent C. Inconsistent
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 green sticker.Use the fact that for A = 
, A-1 = 
.
A. $4.99
B. $4.89
C. $4.96
D. $4.91