Sam wants to invest the same amount at the end of every 3 months so that he will have $5000 in 9 years. The account will pay 3.1% compounded quarterly. How much interest will he earn after 9 years? (Round to the nearest hundredth if
necessary.)

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

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?