Question

Pieter wrote and solved an equation that models the number of hours it takes to dig a well to a level of 72 feet below sea level. 7h – 5(3h – 8) = –72 Which statement is true about Pieter's solution? It cannot be a fraction or decimal because the depth of the well is a whole number. It must be a positive number since it represents a number of hours. It must be a negative number because the depth is below sea level. It cannot be greater than –72 because that is the depth of the well.

Answer 1

Option B is correct

It must be a positive number since it represents a number of hours.

Explanation:

As per the statement:

Pieter wrote and solved an equation that models the number of hours it takes to dig a well to a level of 72 feet below sea level.

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Given the equation as:

Using distributive property,

Combine like terms;

Subtract 40 from both sides we have;

Divide both sides by -8 we have;

h = 14 hours

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Therefore, the statement is true about Pieter’s solution is, It must be a positive number since it represents a number of hours.