I need 21 centimeters but i need to translate that into millimeters wht is the answer in milli eters

Is 13 / 4 the same as 31 / 4? Explain your answer.

In what decade was Art Deco the dominant design in the United States? 1920s 1930s 1940s 1950s

Is 336 inches bigger than 18 ft

How many times does 19 go into 128?

Is 6 pints equal, less than, or greater than 60 fluid onces

Sally is interested in taking a job in a city which she's not familier with the cost of living. She is especially concerned about the cost of housing and is interested in the average cost of a three bedroom home.

A skating rink charges $0.75 to rent skates and $1.25 per hour to skate. How many hours did Penny skate if she was charged $4.50?

Simplify 1/3 12x - 6 A. - 2x-1 B.-2x-8 C.-x+4 D. 3x+10 E. 4x-2

What is 27 x 17? I really need to know.

What is the factored form of the trinomial x^2 + 11x + 28 = 0? (x + 3) (x + 8) (x + 4) (x + 7) (x + 7) (X + 8)