When number is added to the numerator pf 12/13 and subtracted from the denominator, the new fraction is equal to 3/2. find the number

What is the value of the discriminant, b2 ? 4ac, for the quadratic equation 0 = x2 ? 4x + 5, and what does it mean about the number of real solutions the equation has?

Alistair has 5 half-pounds chocalate bars. it takes 1 1/2 pounds of chocalate,broken into chunks, to make a batch of cookies. how many batches can alistair mke with chocalate he has on his hand?

Solve the system of equations. 2x-2y=-4 and x+y=8. show work