If 12 out of 21 students in a class a girl then to the nearest percent what percent of the class composed of girls?

Factor x2 – 8x + 15. which pair of numbers has a product of ac and a sum of what is the factored form of the

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

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?