4y^2 -7y-4=0 find the values of a, b, and c that should be used in the quadratic formula to determine the solution of e quadratic equation

The cash price of a television is $580.the hire-purchase price of the television is $865.the hire-purchase price is an initial deposit of n% of the cash price and 6 equal monthly payments of $120.find the value of n.

What is sin 7x/4 ? i need on this urgent trig

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7