Emily wants to buy turquoise stones on her trip to New MExico to give to at least 4 of her friends. The gift shop sells stones for either $4 or $6 per stone. Emily has no more than $30.

Question

What are the system of inequalities so I could be able to graph them?

Answer 1

let the number of cheap stones be x
let the number of more expensive stones by y

4x + 6y <= 30
x + y >= 4

Answer 2

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