1. En un salón de clase, 40 estudiantes tienen crayolas, 30 tienen colores y 30 tienen plumones; 8 tienen solamente crayolas y colores, 6 tienen solamente colores y plumones, 12 tienen solamente crayolas y plumones. Si 5 tienen las 3 cosas y 6 alumnos no tienen ninguno de los 3 útiles, ¿Cuántos alumnos tiene el salón?

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?