An elementary school teacher is ordering $x$ workbooks and $y$ sets of flashcards for a math class. The teacher must order at least 20 items, but the total cost of the order must not be over $\$80$. If the workbooks cost $\$3$ each and the flashcards cost $\$4$ per set, which of the following systems of inequalities models this situation?

Question

Accepted Answer

$x+y \geq 20$

$3x+4y \leq 80$

Answer

$x+y \geq 20$

$3x+4y \geq 80$

Answer

$3x+4y \leq 20$

$x+y \geq 80$

Answer

$x+y \leq 20$

$3x+4y \geq 80$