Determine the discriminant of 3x2 - 5x + 4 = 0 a) 20 b) 23 c) -23 d) -19 you!

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

Give me the equations of two lines that have the same slope but are not parallel.

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters