Solve the problem.Find the average height of the paraboloid  above the disk   in the .

A. 96
B. 160
C.
D. 32


Answer: D

Mathematics

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Solve the problem.How many 3-digit numbers can be formed using the digits 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0? No digit can be used more than once.

A. 720 B. 120 C. 604,800 D. 1,209,600

Mathematics

Solve for the variable.x +  = 3

A. 14
B.
C.  
D.  

Mathematics

Evaluate the polynomial.2x2 - y2 + 2xy for x = -2 and y = -6

A. -4 B. -52 C. -68 D. 68

Mathematics

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.   = 

Mathematics