Shown is a triangle. The three angles add up to give 180°
(a) Write down an equation for this information
(b) Solve your equation to find x

X+y=-4 x-y=2 use elimination with adding and subtraction

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

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