An elementary school teacher is ordering $x$ workbooks and $y$ sets of flash cards 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 flash cards cost $4 per set, which of the following systems of inequalities models this situation?<br/><br/>$$\begin{array}{c}x+y\geq 20\\ \mbox{
MM
Mashaal Masha
Apr 12, 2024
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?