Grandma is removing weeds from her garden she estimates that there are 250 weeds in the garden at the moment and she can remove weeds at a rate of 5 per minute at this rate how many minutes (m) will it take grandma to only have 30 weeds remaining? Show the equation and solution
Let m be the number of minutes it will take for Grandma to have 30 weeds remaining.
The number of weeds removed in m minutes is 5m.
The number of weeds in the garden after m minutes is 250 - 5m.
Setting the number of weeds in the garden after m minutes to be 30, we get the equation 250 - 5m = 30.
Subtracting 250 from both sides, we get -5m = -220.
Dividing both sides by -5, we get m = 44.
It will take Grandma 44 minutes to only have 30 weeds remaining.