Hola, tengo problemas al resolver este problema y lo tengo que entregar hoy, el problema es: El arco de un puente es una semielipse con un eje mayor horizontal. Abarca 30 pies y la parte superior del arco está a 10 pies por encima del eje mayor. El camino es horizontal y está a 2 pies sobre la parte superior del arco. Determina la distancia vertical del camino al arco en intervalos de 5 pies a lo largo del camino.

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?