Question

During a scuba dive, Lainey descended to a point 20 feet below the ocean surface.She countined her descent at a rate of 20 feet per minute. Write an inequality you could alive to find the number of minutes she can countinue to descend if she does not want to reach more than 100 feet below the ocean surface

Answer 1

`20 + 20x \leq 100`

Explanation:

Let x be the number of minutes she can continue, since she's already 20 feet below the ocean surface and is diving at the rate of 20 ft/minute, her depth with respect to x would be

20 + 20x

But she doesn't want to reach more than 100 feet below the surface

`20 + 20x \leq 100`