Two airplanes are flying to the same airport. Their positions are shown in the graph. Write a system of linear equations that represents this situation. Blue Airplane: (2,4)
Red Airplane: (15,9)
Airport: (6,12)
Please help! Also, remember to put the equation in a system of linear equations and explain each step. Thanks!

An isosceles triangle has two sides of equal length, a, and a base, b. the perimeter of the triangle is 15.7 inches, so the equation to solve is 2a + b = 15.7. if we recall that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side, which lengths make sense for possible values of b? select two options.