The inequality that can be used to find m, the number of months after receiving his fish tank, when Dante will have less than 10 goldfish in his fish tank is 20 - 2m < 10
Since Dante has 20 goldfish and gives out 2 goldfish every month,
After one month, he has 20 - 2 = 20 - 1(2) gold fish left.
After 2 months, he has 20 - 2 - 2 = 20 - 4 = 20 - 2(2) goldfish left.
After 3 months, he has 20 - 2 - 2 - 2 = 20 - 6 = 20 - 3(2) goldfish left.
So, after m months, he has 20 - 2m goldfish left.
For the number of goldfish to be less than 10, we have the inequality
20 - 2m < 10
So, the inequality that can be used to find m, the number of months after receiving his fish tank, when Dante will have less than 10 goldfish in his fish tank is 20 - 2m < 10
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