Question

At the beginning of the summer, the water level of a pond is 2 feet below its normal level. After an unusually dry summer, the water level of the pond dropped another 1 1/3 feet.

Write an equation to show how far above or below the normal water level the pond is at the end of the summer.

Answer 1

n = Normal water level
d = Dry water level

$d = n - (2 + 1.333)$

Answer 2

Answer:

$-3\frac{1}{3}$

Step-by-step explanation:

Since, after decreasing the water level by 2 feet,

Changes in water level = -2 feet,

Again after decreasing the water level by $1\frac{1}{3}$ feet,

Changes in water level = $-1\frac{1}{3}$ feet,

Thus, the total change in water level = $-2-1\frac{1}{3}$

$=-2-1-\frac{1}{3}$

$=-3-\frac{1}{3}$

$=-(3+\frac{1}{3})$

$=-3\frac{1}{3}$

Which is the required expression.