What is two fractions equivalent to 8/9

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.