D(5, 7), E(4, 3), and F(8, 2) form the vertices of a triangle. What is m∠DEF?

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

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2

Which situation could best be represented by this linear equation? 24x + 38y = 520 > if x represents the number of bracelets and y represents the number of rings, there were 24 more bracelets sold than rings. the total sales were $520. if x represents the number of bracelets and y represents the number of rings, there were 38 more bracelets sold than rings. the total sales were $520. if x represents the number of bracelets sold at $24 each and y represents the number of rings sold at $38 each, the total sales were $520 if x represents the number of bracelets and y represents the number of rings, there were 520 bracelets and rings sold. bracelets were $24, and rings were $38. e