When will the cost of the protein bars and bands income be equal?

What is the missing constant term in the perfect square that starts with x^2 -20x

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin. how many doctors use brand x aspirin