Please explain. If you explain for B and answer for A i will give you brainist answer

Agroup of students want to create a garden. they do not know the exact measurements but they propose using a variable to represent the length and width of the garden. the length of the garden is 10 feet longer than double the width. use a single variable to write algebraic expressions for both the length and width of the garden. write an algebraic expression for the area of the garden. use mathematical terms to describe this expression.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square