I forgot what 25 divided by 12 is lol pls help me

What is the standard form of -5x^2+2x^4-11+x^3+3x

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.