In a computer class, a group of 4 girls shared a computer and printer to print their math projects. The total time to print the projects was 12hour. Each girl needed the same amount of time to print her project. What part of an hour did it take each of the 4 girls to print her project?

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Which of these triangle pairs can be mapped to each other using two reflections?

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0