Simplify the expressions by combing all like terms 7x2 +4x - x2

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Mama mia restaurant used 1 2 2 1 ? of their mozzarella cheese making pizza and the remaining 6 4 64 ounces making pasta. how many pounds of mozzarella cheese did mama mia start with?