A boat can travel upstream 28 kilometers in 2 hours, and can make the return trip in 1 hours. Let b= rate in km/ hr of the boat and c= rate in km/hr of the downstream current. Which set of equations best describes this situation?

Acylinder with a base diameter of x units has a volume of jxcubic units which statements about the cylinder are true? check all that apply. the radius of the cylinder is 2 x units. the radius of the cylinder is 2x units. the area of the cylinder's base is 200 square units. the area of the cylinder's base is a square units. the height of the cylinder is 2x units. the height of the cylinder is 4x units. mark this and return save and exit next submit

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points

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?