standard_description: Find the inverse of a matrix if it exists and use it to solve systems of linear equations (using technology for matrices of dimension 3 × 3 or greater).
problem_activity: Task
It requires $\frac14$ of a credit to play a video game for one minute.
Emma has $\frac78$ credits. Can she play for more or less than one minute? Explain how you know.
How long can Emma play the video game with her $\frac78$ credits?


aligns: no