Here's a real life CSI application of algebra for your students....
There has been a suspicious death. Using their knowledge of formulae and quadratic equations, students have to gather evidence from the crime scene and mortuary to determine (1) who was with the victim moments before death and (2) whether the death was a tragic accident or cold-blooded murder.
At the Crime Scene - The victim died after falling from a balcony. Students have to collect information on the distance of the body from the building to determine whether it was an accidental fall or murder.
At the Mortuary - Students must match a bite mark left on the body with teeth impressions taken from three suspects to find out who was with the victim when he fell.
The preview shows some of the pages from the resource. Please note, it does include an answer page.
Here are some other resources you may be interested in:
Crime Scene Algebra - Writing & Using Formulae
Crime Scene Algebra - Using Formulae & Linear Regression
Crime Scene Algebra BUNDLE - all three Crime Scene Algebra Activities