A bag contains balls colored in the 7 different colors of the rainbow (all of the balls are the same size). What is the minimum number of balls one needs to pick out of the bag in order to definitely get three same-colored balls.

Kevin has just finished paying off his loan. he was assessed a service charge of $422. he paid off the principal and the interest by making weekly payments of $36.13 for four years. if the principal was $7,150, how much did kevin pay in finance charges, to the nearest dollar? a. $498 b. $365 c. $422 d. $787

Ineed with number 17 i don’t get it at alll

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?