What is the x coordinate of the solution for the system of equations ?

y-x=9
10+2x= -2y

x=?

Stephen thublin invests $1,000,000 in a 45-day certificate of deposit with 6.55% interest. what is the total interest income from the investment?

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.