mathcollege URGENT**
posted by Anne .
in sentence form using one variable and one equation/inequality solve:
sue makes $15/hour tutoring and averages $10/hour waitressing. Out of 30 hrs working time, what is the minimum # of hours she should tutor if she is to make at least $475?

Can't be done. Even if she spent all 30 hours tutoring, she'd only make $450.
Check your problem for typos somewhere.