If Engine A uses 4 gallons per hour and Engine B uses 3 gallons per hour, what is the combined fuel consumption over 5 hours?

To determine the combined fuel consumption of Engine A and Engine B over 5 hours, it's important to first calculate the fuel consumption for each engine individually for that time period.

Engine A consumes 4 gallons per hour. Over 5 hours, the total fuel consumption for Engine A can be calculated as follows:

Fuel consumption of Engine A = 4 gallons/hour * 5 hours = 20 gallons.

Engine B consumes 3 gallons per hour. Over 5 hours, the total fuel consumption for Engine B is:

Fuel consumption of Engine B = 3 gallons/hour * 5 hours = 15 gallons.

Next, to find the total combined fuel consumption from both engines, you add the fuel consumption of Engine A and Engine B together:

Total fuel consumption = Fuel consumption of Engine A + Fuel consumption of Engine B

= 20 gallons + 15 gallons = 35 gallons.

Thus, the combined fuel consumption over 5 hours is 35 gallons. The correct answer is indeed 35 gallons.