cuanto es (2a + 3b + c) + (5b + 8c + a) ??? cuanto es o como se resuelven estas operaciones lo necesito por que no entiendo

Solutions for 2x+7 less than or equal to 3x-5

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

Find the value of x. round the length to the nearest tenth