Write an equivalent equation that does not contain fractions

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?