Which expression is equivalent to 21 + 49?

A 7 (3 + 49)

B 7 (3 + 7)

C 7 (14 + 42)

D 7 (14 + 49)

F (x) = 5x-3 who knows the answee

Find the volume of a cylinder that has a radius of 2 kilometers and a height of 1 kilometer. Volume = km³ (Use 3.14 for pi and round your answer to the nearest tenth.)

when solving the equation, which is the best first step to begin to simplify the equation? - 2 (x+3) = -10

ming-li be spent $15 at the movies. She then earned $30 babysitting. She spent$12 at the bookstore. She now has $18 left. How much money did she have to begin with?

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