Rearrange the equation A=xy to solve for x

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The quadratic function h(t)=-16.1t^2+150 choose the graph representation

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