Leila bought 3 bananas, which weighed a total of 3/4 of a pound. if each banana weighed the same amount, what is the weight of each banana?

In the diagram below, dab and dac are adjacent angles. if mdac = 25°, what is mdab in degrees? what is mbac in degrees?

Kayla has a $500 budget for the school party. she paid $150 for the decorations. food will cost $5.50 per student. what inequality represents the number of students, s, that can attend the party?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?