Answer :
The inequality which represents the number of jeans and sweater which he must purchase is; $17x + $9y >= $75.
Which inequality represents his purchase to receive free shipping?
It follows from the task content that, to receive free shipping, $75 or more must be spent on the pieces of clothing to receive free shipping.
On this note, it follows that the required inequality is; $17x + $9y >= $75.
This follows from the fact that jeans are $17 each and sweaters are $9 each.
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