Me need a lot of help

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

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