Multiply.7y(y3 + 7y + 5)
A. 7y4 + 49y2 + 35y
B. 7y4 + 7y2 + 35
C. 14y3 + 49y2 + 35y
D. 7y3 + 7y2 + 35y
Answer: A
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Simplify the following expression.
?
?
A. 
(x + y)2?
B. 
(x + y)
C. 
(x + y)
D. 
(x + y)3
E. 
(x + y)2
Express in scientific notation.0.000000446019
A. 4.46019 × 10-6 B. 4.46019 × 106 C. 4.46019 × 10-7 D. 4.46019 × 107
Perform the indicated operation. Write the answer in simplest form. If the answer is an improper fraction, write it as a mixed number.
A. 38
B. 
C. 23
D. 38
Solve each problem.Le Boulangerie, a bakery, sells four main items: sweet rolls, bread, cakes, and pies. The amount of each ingredient (in cups, except for eggs) required for these items is given by matrix A. Eggs Flour Sugar Shortening Milk
= A
The cost (in cents) for each ingredient when purchased in large lots or small lots is given in matrix B. Cost
Large Lot Small Lot
= B
Suppose a day's orders consist of 20 dozen sweet rolls, 200 loaves of bread, 50 cakes, and 60 pies. Use matrix multiplication to find a matrix giving the costs under the two purchase options to fill the day's orders.
A. 
B. 
C. 
D. These matrices cannot be multiplied.