Paul's plumbing charges a flat fee of $90 plus $40/h for plumbing job. perfect pipes charges a flat fee of $60 plus $55/h for a plumbing job. a) write the expressions to represent the total costs of a plumbing job each for company. let "h" represent the time, in hours, of a plumbing job. b) is the cost of a 3- hour-long plumbing job the same at both companies? write and use an equation to find out.

Choose the linear inequality that describes the graph. the gray area represents the shaded region. a: y ≤ –4x – 2 b: y > –4x – 2 c: y ≥ –4x – 2 d: y < 4x – 2

Which graph of a hyperbola represents the equation 16x^2-y^2=16

Need to finish my juan wants to build a greenhouse in his back yard. he needs to maximize the ratio of floor area to structure volume in order to provide the most room for plants while minimizing the area to be heated. find the description of the structure that best meets juan’s criteria. a.) a hemisphere with a diameter of 12 feet b.) a cube with a side length of 12 feet c.) a cone with a diameter of 12 feet and a height of 10 feet d.) a square pyramid with a base side length of 12 feet and a height of 9 feet