Your company gives you a cell phone plan which allows you 600 minutes to talk per month. so far this month, you have used 330 minutes and you have 10 days left on this month's plan. which inequality could you use to determine how many minutes at most you can use per day so that you don't go over your monthly plan minutes? a.)10x+330≥600 b.)10x+330> 600 c.)10x+330≤600 d.)10x+330< 600

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?