*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?

Solution

VerifiedWe have,

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 |