Solve the system of equations by the elimination method. Check your solutions. For any dependent equations, write your answer in ordered pair form.

A. ?
B. {(4, -3)}
C. {(5, -4)}
D. {(3, 4)}

Answer: B

Mathematics

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Write the product as a sum or difference containing only sines or cosines.sin(8?) sin(4?)

A. [ cos(4?) - cos(12?)]
B. [cos(12?) - cos(4?)]
C. sin2(32?2)
D. [sin(12?) + cos(4?)]

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Mathematics

Identify the element specified for the matrix.a11

A. 3 B. -6 C. 5 D. -4

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Mathematics

Solve the problem.The pressure of a gas varies jointly as the amount of the gas (measured in moles) and the temperature and inversely as the volume of the gas. If the pressure is  (kiloPascals) when the number of moles is 8, the temperature is , and the volume is , find the pressure when the number of moles is 9, the temperature is ,

and the volume is .

A. 1456
B. 754
C. 780
D. 1508

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Mathematics

Simplify.1 - 2[3 - (7x + 5)]

A. -7x - 15 B. 14x + 5 C. -7x + 5 D. 14x - 15

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Mathematics