What are the answers to thins? i need all of the blanks filled!

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

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?

When you find the area of a triangle do you use in. or in2