Atextbook store sold a combined total of 248 math and history textbooks in a week. the number of history textbooks sold was 68 less than the number of math textbooks sold. how many textbooks of each type were sold?

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