You have $100 in your savings account and plan to deposit $20 each month. Write a linear equation to model the situation. y= 100x + 20
y= 80x
y= 20x + 100
y= 120x

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?