Simplify (19x2 + 16x + 45) - (9x2 + 13x + 23).

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?

Reagan lives five miles farther from school than vanessa lives. write an expression to describe how far reagan lives from school