At the grocery store, Lindsay bought several pounds of strawberries. The strawberries cost $2.25 per pound. After she paid the c
ashier, she had $8.75 remaining. Write an expression with one variable to represent the amount of money Lindsay had before she bought the strawberries. Then, use your expression to find how much money Lindsay started with before buying 4 pounds of strawberries. Explain your thinking.
Let x equal the number of strawberries while y is the total amount of money she had.
The equation is: 2.25(x)+8.75=y.
Then, if she bought 4 pounds of strawberries, it would work as follows: 2.25(4)+8.75 is the total amount. That means 9+8.75 would be the total. Thus, the amount of money she started out with was 17.75 dollars.
You can tell if two fractions are proportional by cross multiplying the fractions. If the fractions are equivalent, then they are proportional. If they are not equivalent, they are not proportional.
