Si un amigo de Lorena tiene el doble de canciones que ella en su reproductor de música y juntas suman 60 canciones. ¿Cuántas canciones tiene Lorena?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?