Explain why 3/4 is graphed to the right of 1/4 but -3/4 is graphed to the left of -1/4

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?

Gabrielle's age is three times mikhail's age. the sum of their ages is 40 . what is mikhail's age? __ years old

Ling is using fraction strips to add 2/3 and 7/12's the sum is one whole plus how many twelves?