The third grade class collected coins for the week. Class one raised 34.00. Class two raised 45.00 .Class three raised 76.00.How much did all three classes raise?(rounnd to the nearest tens

Triangle xyz has vertices x(1,3), y(0,0)

What is the 12th term of b(n)=-4-2(n-1)

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