AlgebraEasyKilometres left when the fuel runs out
Algebra practice question
A scooter's remaining fuel f, in litres, after it has travelled d kilometres is given by f = 6 − 0.5d. After how many kilometres will the fuel run out?
Answer: 12
Set f = 0: 6 − 0.5d = 0 gives d = 12.
Common wrong answers
- If you answered 3
- 3 multiplies 6 by 0.5 instead of dividing.
- If you answered 6
- 6 is the starting fuel, not the distance.
- If you answered 0.5
- 0.5 is the fuel used per kilometre.
More Algebra questions
- Easy
If 3x + 7 = 22, what is the value of x? - Easy
If x/4 = 9, what is the value of x? - Easy
The function f is defined by f(x) = 6x − 5. What is the value of f(3)? - Easy
The perimeter P of a rectangle with length l and width w is given by P = 2l + 2w. Which of the following expre… - Easy
Which equation defines the function f? - Easy
In the xy-plane, the graph of the equation y = 4x − 12 crosses the x-axis at the point (a, 0). What is the val…
Not affiliated with the College Board. SAT is a trademark of the College Board.