Mary and Betty went apple picking. Each time Mary picked 3 apples Betty picked 5 apples. At home the girls found out that Betty collected 16 more apples than Mary. How many apples did each girl pick?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?

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