carlos is driving on a highway. he uses one gallon of gas every 40 miles he drives. the distance, D (in miles), he travels on g gallons of gas is given by the following function. D(g)=40g How far does carlos drive if he uses 3 gallons of gas?

Question

carlos is driving on a highway. he uses one gallon of gas every 40 miles he drives. the distance, D (in miles), he travels on g gallons of gas is given by the following function. D(g)=40g    How far does carlos drive if he uses 3 gallons of gas?

math&ing001 · Answer

You simply replace g with 3 :
D(3) = 40*3