Which algebraic expression represents this phrase? the product of 16 and the time after the start

1. 16 • t
2. 16 + t
3. 16/t
4. 16 – t

For what value of x does 4x = (1/8) x + 5?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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