Reduce these fractions to the simplest form: 21/42= * 1. 1/2
2. 3/6
3. 7/14
4. 4/8

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.