Mr. Wen has a desk that is shaped like a trapezoid. The diagram shows the dimensions of the desk. What is the area of the desk?

A. 5 square feet

B. 7 square feet

C. 10 square feet

D. 12 square feet

7x+8y=-18, 4x-9y=-3 solve the system of equations

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.

Can someone plz me understand how to do these. plz, show work. in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]