there is mirror a of area x m² and mirror b of area (x+1)m² each mirror costs $260. write down an expression in terms of x for the cost per square metre of (i) mirror a (ii) mirror b​

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?