Solve the problem.If -15 is added to a number and the sum is doubled, the result is 9 less than the number. Find the number.

A. 24
B. 39
C. 21
D. -39

Answer: C

Mathematics

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Divide and simplify. Assume that all variables represent positive numbers.

A. 8
B. 8x4
C. 8x8
D. 8x4

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Mathematics

State the dual problem. Use y1, y2,  y3 and y4 as the variables. Given: y1 ? 0, y2 ? 0,  y3 ? 0, and y4Maximizez = 3x1 + 2x2subject to:x1 + x2 ? 14 2x1 + x2 ? 28 x1 ? 0, x2 ? 0

A.

Minimizew = 28y1 + 14y2
subject to:2y1 + y2 ? 3
 y1 + y2 ? 2
B.
Minimizew = 14y1 + 28y2
subject to:y1 + 2y2 ? 3
 y1 + y2 ? 2
C.
Minimizew = 28y1 + 14y2
subject to:2y1+ y2 ? 3
 y1 + y2 ? 2
D.
Minimizew = 14y1 + 28y2
subject to:y1 + 2y2 ? 3
 y1 + y2 ? 2

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Mathematics

It is possible for a triangle to be both isosceles and obtuse.

Answer the following statement true (T) or false (F)

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Mathematics

Add.84.596 + 29.6 + 3.11 + 22.34

A. 139.646 B. 140.646 C. 139.746 D. 139.656

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Mathematics