To get the inequality to represent greatest number of days she can continue before she has to replenish her stock, we will say;
1 day = 2 bottles
d days = 24 bottles
Cross multiply
2 * d = 1 * 24
2d = 24
Since we want to know the greatest number of days she can continue before she has to replenish her stock, the <u>equal to </u>to sign will be replaced with<u> less than or equal to</u> sign as shown;
2d≤24
<em>This shows that the maximum number of days she can continue before replenishing is 12days. It cannot exceed</em>