Elena is solving this system of equations: equation 1: 10x - 6y = 16 equation 2: 5x – 3y = 8 She multiplies the second equation by 2. then subtracts the resulting equation from the first. To her surprise, she gets the equation () = 0. What is special about this system of equations? Why does she get this result and what does it mean about the number of solutions to this system? (If you are not sure, try graphing them.)​

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.