Subtract the two expressions. 2b + 4 from -8b - 12

The table respent two linear functions the equation respented by the first tables is given

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?

What is the perimeter of a rectangle if the length is 5 and the width is x?