Lisa bought six dog toys. each dog toy costs the same amount. she spent a total of $10.50. write an expression that represents the situation. use d to represent the cost of each dog toy.

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups