Which of the following lists of ordered pairs is a function?

What are the digits that repeat in the smallest sequence of repeating digits in the decimal equivalent of 24/11?

The product of sin 30 degrees and sin 60 degrees is same as the product of

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?