Solve the system of equations using Cramer's rule.7x + 9y - z = 63x - 5y - 4z = -33-8x + y + z = -39
A. (-6, 3, 12)
B. (6, 3, 6)
C. (6, 3, -6)
D. (6, 6, 3)
Answer: B
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Factor the polynomial using the greatest common binomial factor.x(x + 13) + 9(x + 13)
A. (x2 + 13x)(9x + 117) B. (x - 13)(x - 9) C. (x2 + 13)(x2 + 9) D. (x + 13)(x + 9)
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 an orange sticker.Use the fact that for A = 
, A-1 = 
.
A. $5.70
B. $5.81
C. $6.28
D. $5.45
Graph the function.
A. 
B. 
C. 
D. 
Name the correct property to make the sentence true.4(z + r) is equivalent to 4z + 4r by the
A. associative law for addition. B. commutative law for addition. C. associative law for multiplication. D. distributive law.