Question

Thanks if you can solve this

Answer 1

10 minutes

Explanation:

You want to know the time it takes for a wood pile to have 45 sticks if 7 are added and 3 are removed each minute, and the pile started with 5 sticks.

Setup

The number of sticks in the woodpile, y, can be modeled in terms of t minutes as ...

y = 5 +7t -3t

Solution

We want to find the value of t that makes y = 45:

45 = 5 +4t

40 = 4t

10 = t

The woodpile will contain 45 sticks after 10 minutes.

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