This is a circuit and I need help

Me with this one question, and i'll upvote the brainliest answer

Alana has 12.5 cups of flour with which she is baking four loaves of raisin bread and one large pretzel. the pretzel requires 2.5 cups of flour to make. how much flour is in each loaf of raisin bread? explain the steps to follow to get the answer.

Write the expression 7x^3-28xy^2 as the product of 3 factors