Name: 41 ses lerber
period:
date:
21z
adding and subtracting rational numbers
at the beginning of the summer, the water level of a pond is 2 y2 feet below its
i level. after an unusually dry summer, the water level of the pond dropped
-113 another 113 % feet.
a. use a number line diagram to model the pond's current water level in relation to
its normal water level.
b. write an equation to show how far above or below the normal water level the
pond is at the end of the summer.