Question

Christina goes to market with $50. She buys one papaya for $20 and spends the rest of the money on bananas. Each banana costs $6. <br />

Write an inequality for the number of bananas she can purchase?

Answer 1

Christina has 50 dollars, and she spends 20 on a papaya. So, 50 - 20 = 30 dollars left.

So whatever amount of bananas she buys, it has to be < 30. No greater than 30 dollars; or less than 30 dollars, however you choose to say it.

We don't know the amount of bananas (you could figure it out, but i am not sure that is what they are asking)

So, because we do not know how many shes buying, we use the variable x. And each banana is 6 dollars.

So, X bananas x 6 dollars < 30

I would say it would look something like : 6x < 30 or 6 · X < 30

Answer 2

So, she has 50 - 20 = $30 for buying bananas. From where each banana costs 6, so lets say that the number of bananas is x, so we have:
6x <= 30
that is, x bananas at $6 each has to be less or equal to the available $30