Together, steve and tom sold 89 raffle tickets. steve sold 14 more than twice as many raffle tickets as tom. how many raffle tickets did each boy sell? how many tickets did tom sell?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)