Arectangular box with an open top has a length of x feet, a width of y feet, and a height of z feet. it costs $4.20 per square foot to build the base and $0.75 per square foot to build the sides. write the cost c ofconstructing the box as a function of x, y, and z

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.