*Nutrition* A glass of skim milk supplies $0.1 \mathrm{mg}$ of iron and $8.5 \mathrm{~g}$ of protein. A quarter pound of lean red meat provides $3.4 \mathrm{mg}$ of iron and $22 \mathrm{~g}$ of protein. If a person on a special diet is to have $7.15 \mathrm{mg}$ of iron and $73.75 \mathrm{~g}$ of protein, how many glasses of skim milk and how many quarter-pound servings of meat would provide this?
was $\$ 100,000$ and his total yearly interest payment was $\$ 10,900$, how much did he borrow from the bank?

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A glass of skim milk gives $0.1$ mg of iron and $8.5$ g of protein.
A quarter-pound of lean red meat gives $3.4$ mg of iron and $22$ g of protein.
\
Let,
$x =$ number of glasses of skim milk
$y =$ number of quarter-pounds of lean red meat

| | Iron | Protein 
|--|--|--| 
|$\quad x\quad$ |$0.1$ mg| $8.5$ g| 
|$\quad y$|$3.4$ mg |$22$ g |

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