Somebody please help

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?