Perform the indicated operation. Where possible, reduce the answer to its lowest terms.
? 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Simplify the expression.sin x cos(x + y) + cos x sin(x + y)
A. cos(2x + y) B. sin(2x + y) C. cos y D. sin y
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Determine the value of the variable so that the equality is a proportion.
= 
A. 7.43 B. 0.07 C. 13.44 D. 9
Mathematics
Solve the equation by the square root property.x2 = 20
A. {400}
B. {
}
C. {±2
}
D. {10}
Mathematics
Solve the problem.When the temperature stays the same, the volume of a gas is inversely proportional to the pressure of the gas. If a balloon is filled with 102 cubic inches of a gas at a pressure of 14 pounds per square inch, find the new pressure of the gas if the volume is decreased to 51 cubic inches.
A. 26 psi
B. 28 psi
C. 14 psi
D. 
psi
Mathematics