Simplify the complex rational expression.

A. x - 2
B.
C.
D.  


Answer: D

Mathematics

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Multiply using the Russian Peasant method.419 × 137

A. 56,493 B. 57,183 C. 56,683 D. 57,403

Mathematics

Use the sum/difference identities to simplify the expression. Do not use a calculator.cos 5° cos 40° - sin 5° sin 40°

A.
B.
C. - 
D. 1

Mathematics

If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth. Variables represent any real number.

A. 27 B. 3 C. -3 D. 9

Mathematics

Find the sum of the convergent series ?

A.
B. ?
C. ?
D. ?
E. ?

Mathematics