Which system of inequalities could be used to solve the problem below?

a local theater has a maximum capacity of 1,000 people. for their latest production, adult tickets cost $25 and youth tickets cost $12.50. the theater must bring in more than $15,000 for the show to go on. how many of each ticket must be sold to save the show?

answer choices are shown in pic

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Aflower has 26 chromosomes. to create a new flower, how many would a sperm cell have what is called?

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)