Question

You can earn 5 coinsDue to a drought, the water level of a pond is 7 feet below normal level. After a rainy month, the pond'swater level rose 2} feet. Where is the pond's current water level in relation to its normal water level?

Answer 1

the water level of the pond is initially 7 feet below normal level. So, we can associate its value with the number -7 (negative seven) since the level is lower than the normal (zero level).

AFter the raini month, the level rose by 2 and 1/3 feet, since this is a positive increase in the level, we represent it with a positive number. Not only that, but to make operations simpler, we convert it into a fraction, as: 2 + 1/3 = 7/3

Then, the final water level after the rain will be given by the following addition of a negative number plus a positive fraction:

-7 + 7/3 = -14/3

which we can also translate into a mix number if the teacher wants it (most likely) in that form:

- 14/3 = - (4 2/3)

So the water level is still below the normal (given still a negative sign) and the distance from the normal level is 4 and 2/3 feet.

Answer: 4 and 2/3 feet below the normal level.