The points (-18, 15) and (-20, 15) lie on a circle with a radius of 1. Find the coordinates of the center of the circle.

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

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?

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?