Solve the problem.Three different high schools plan to order the same three text books. School A plans to order 90 of book 1, 20 of book 2, 80 of book 3. School B plans to order 60 of book 1, 20 of book 2, 20 of book 3. School C plans to order 80 of book 1, 100 of book 2, 70 of book 3. The cost of book 1 is $15 per copy, the cost of book 2 is $20 per copy, and the cost of book 3 is $25 per copy. What matrix product displays the cost to each school of buying the textbooks? Display the two matrices which must be multiplied and their product.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: A
Mathematics
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Let ? be an acute angle. Find the unknown trigonometric value using the given information.sin ? if csc ? = 
A. 
B. 
C. 
D. 
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Find the exact value of the expression or state that it does not exist.sin
A. 
B. - 
C. 
D. - 
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Mary has two kinds of flowers in her garden: rose and lilies. Maryplanted only lilies, but rosecame up too. There are 79 flowers in Mary's garden, and there are 19 more rose than lilies. How many of the flowers are lilies and howmany are rose?
A.
B.
C.
D.
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