Solution:
Given that:
Rodney is helping to make hamburgers for the football game. He's made 10 hamburgers so far.
His coach asked him to make at least 30 hamburgers but, no more than 80.
The inequality is
Solving the inequalities separately;
For the first part
For the other part;
The solution to the inequality is
From the solution;
Hence, we can conclude that Rodney must make at least 20 more hamburgers but, not more than 70 hamburgers.