A family has two cars. The first car has a fuel efficiency of 15 miles per gallon of gas and the second has a fuel efficiency of 25 miles per gallon of gas. During one particular week, the two cars went a combined total of 1375 miles, for a total gas consumption of 65 gallons. How many gallons were consumed by each of the two cars that week?

Question

anonymous · Answer

can someone help me plz

anonymous · Answer

Let x and y be the number of gallons of gas consumed by the first and second car respectively.  Solve the following equations for x and y.$$15x+25y=1375, x+y=65$$$$\{x=25 \text{ gal},y=40 \text{ gal}\} $$

anonymous · Answer

thank you

anonymous · Answer

Two mechanics worked on a car. The first mechanic worked for 5 hours, and the second mechanic worked for 15 hours. Together they charged a total of $1550 . What was the rate charged per hour by each mechanic if the sum of the two rates was $140 per hour? can you help me with this one 2 ?