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. $4.91
D. $4.96
Answer: D
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Solve the problem. Unless stated otherwise, assume that the projectile flight is ideal, that the launch angle is measured from the horizontal, and that the projectile is launched from the origin over a horizontal surfaceFind the muzzle speed of a gun whose maximum range is 17.8 km. Round your answer to the nearest tenth.
A. 13.2 km/sec B. 13.7 km/sec C. 174.4 km/sec D. 174.9 km/sec
Graph the function.y = - 
cos 
A. 
B. 
C. 
D. 
Determine whether the Law of Sines or the Law of Cosines should be used to begin to solve the given triangle. Do not solve the triangle. 
A. Law of Sines B. Law of Cosines
Show that the following statement is true by transforming the left side into the right side.
?
What will be an ideal response?