Heba ate 1/12 of a box of cereal. now the box is 3/4 full. what fraction of a full box was there before heba ate?

Which is the completely factored from of xy^3-x^3y

Ivan and jeff buy a package of 8 pens for $4.00. ivan wants 5 of the pens, and jeff wants 3.how much should each student pay?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?