Question

The water level is a number that indicates whether the level is above or below normal using positive or negative values. After a heavy storm, the water level of a river is −3.7 feet. This level is 1/2 times 2.5 feet more than the previous water level.

What was the previous water level?

Drag and drop a value into the box to correctly complete the statement.

The previous water level of the river was [Choose] feet.

A. -18.5

B. -9.9

C. -4.9

D. -4.3

Answers

  1. The previous water level, based on the information provided, is -9.9 feet.

    What in math is an integer?

    An integer is a complete number that may be positive, negative, and zero and is not a fraction. Integer examples include: -5, 1, 5, 8, 97, as well as 3,043. 1.43, 1 3/4, 3.14, and other numbers which aren’t integers are a few examples.

    Why is the integer named Z?

    The German word Zahlen, essentially meaning “numbers,” is where the notation Z for the collection of integers originates. Positive integers are those that are strictly greater than zero, while negative integers are those that are strictly smaller than zero.

    Briefing:

    Given that after a heavy storm, the water level of a river is −3.7 feet. This level is 1/2 times 2.5 feet more than the previous water level.
    The previous water level is calculated as,
    1/2 ( x + 2.5 ) = -3.7
    x + 2.5 = -7.4
    x  = -7.4 – 2.5
    x = -9.9
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