Question

Lisa and Daisy work at a hair salon. The salon charges $21 for a hair styling session with Lisa and $17 for a session with Daisy.

Their income on a certain day is projected to be $357. This situation can be represented by the equation 21x + 17y = 357, where x is the number of Lisa's customers and y is the number of Daisy's customers.

(Technical details: x ≥ 0, y ≥ 0, and x and y take only integer values.)

How many customers would Lisa need to serve to attain the projected income if Daisy calls in sick that day?

Answer 1

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Explanation:

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Answer 2

Answer: Lisa would need to serve 17 customers to attain the projected income.

Explanation:

Their income on a certain day is projected to be $357.

This situation can be represented by the equation 21x + 17y = 357, where x is the number of Lisa's customers and y is the number of Daisy's customers.

On a day that Daisy is sick, the income from Daisy would be zero. For Lisa to attain the projected income of $357, the equation becomes

21x + 0 = 357

21x = 357

x = 357/21

x = 17