Please help urgently with these problems show the work please its for a test i need this asap i label you the branliest

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0