Anumber is chosen at random from 1 to 50. find the probability of selecting numbers with 3 in the tens places

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

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

Put the equation in slope intercept form by solving for y