Colette has already baked 20 pies, and she can bake 1 pie with each additional cup of sugar she buys. How many additional cups of sugar does Colette need in order to bake a total of 28 pies?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

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

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a