Which values of a c will casue the quadratic equation -x^2 +3x+c=0 to have have no real number solutions?

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]