Formative Practice: Algebra Criterion A

An energy company develops a new fuel that consists of two main components, X and Y. The fuel is sold at two different rates based on the size of the purchase. The total price of the fuel is determined by the ratio of components X and Y in the formula.

For small purchases, the company charges $8 for every liter of component X and $3 for every liter of component Y. The total price for a small tank is $70.

For large purchases, the company charges $10 for every liter of component X and $5 for component Y, and a full tank costs $90.