Set up and solve a system of equations to solve the problem.
1. Ajar contains n nickels and d dimes. There are 20 coins in the jar, and the total value of the
coins is $1.40.
How many nickels and how many dimes are in the jar?

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

What ia the sum if the first 7 terms of the geometric series

The area of each triangle is 7 square units. the surface area of the triangular prism is