Simplify the expression.20 + 19 ? 22

A. 438
B. 61
C. 858
D. 402

Answer: A

Mathematics

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A. -90° B. 2 C. 180° D. 5

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Find the matrix product when possible.

A.

B.

C.

D.

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Find all solutions to the equation.cos2 x = 0.8(Use a calculator. Express your answer in radians as a decimal rounded to the nearest thousandth.)

A.  
B.  
C.  
D.

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