Hank bought a $24,000 car when he graduated from college. if his car depreciates at a rate of 10% per year, how long will it take for the car to lose half its value? a) 4 months b) 5 years c) 6 years, 7 months d) 7 years, 4 months

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?