Find the difference, regrouping when necessary.

A. 48
B. 88
C. 38
D. 32


Answer: C

Mathematics

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Find the vertex of the parabola and determine if it is a maximum or minimum. y = 2x2 + 12x + 20

A. (-3, 2); minimum B. (-3, -2); minimum C. (-3, 2); maximum D. (-3, -2); maximum

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Solve the problem.The time it takes to complete a certain job varies inversely as the number of people working on that job. If it takes 28 hours for 7 carpenters to frame a house, then how long will it take 42 carpenters to do the same job?

A. 4.7 hr B. 40 hr C. 42 hr D. 10.5 hr

Mathematics

Solve the system using the inverse matrix method.

A. x = 3, y = 2; (3, 2) B. x = -3, y = -2; (-3, -2) C. x = -2, y = -3; (-2, -3) D. x = 2, y = 3; (2, 3)

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Add.?-13? + 39

A. -52 B. -26 C. 26 D. 52

Mathematics