Three-fourths of the sixth grade students at ashlee’s school are twelve years old. one-half of the twelve year old students are boys. what fraction of the sixth grade students are twelve year old boys? use numbers to explain your answer.

Afamily has two cars. the first car has a fuel efficiency of 25 miles per gallon of gas and the second has a fuel efficiency of 15 miles per gallon of gas. during one particular week, the two cars went a combined total of 1025 miles, for a total gas consumption of 55 gallons. how many gallons were consumed by each of the two cars that week?