Angle a and angle b are vertical angles. If the measure of angle a = (3x - 30) and the measure of angle b = (2x - 9), then find the value of x

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters .

How do you find principle and simple interest

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