For real numbers a and b, when is the equation absolute value of a + b = absolute value of a - b true? a. always b. only when a=b c. only when a=0 and b=0 d. only when a=0 or b=0 e. never

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?