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. $6.79
B. $6.87
C. $6.99
D. $6.50
Answer: B
You might also like to view...
Translate the sentence into an equation, then solve.r decreased by 
is 5.
A. r - 5 = 
, r = 1
B. r - 
= 5, r = 5
C. 
- r = 5, r = 5
D. r - 
= 5, r = 4
Use modular arithmetic to find the answer.Find all x such that x = 9 (mod 13).
A. x = 13 + 9k, where k is an integer B. x = 9 + 13k, where k is an integer C. x = 13 + 22k, where k is an integer D. x = 9 + 13
Write the number in words.30,986,007
A. three million, nine hundred eighty-six thousand, seventy B. thirty million, nine hundred eighty-six thousand, seventy C. three million, nine hundred eighty-six thousand, seven D. thirty million, nine hundred eighty-six thousand, seven
Find the angle between v and w. Round to one decimal place, if necessary.v = 3i + 2j + k and w = 4i + 5j + 2k
A. 73° B. 66.7° C. 75.2° D. 17°