So if you follow the pythagorean theorem, we substitute the hypotenuse for c² and the leg (12) for either a² or b² because a and b are both legs, so it doesn't matter.
now we have a²+12²=13²
But I usually take the shortcut..and instead of a²+12²=13²
I subtract 12² from 13² (it's the same thing)
After you subtract 13²-12²=a²...you find the square root of 13²-12²
High School Mathematics 5+3 pts
Eli took the fleet of 8 vans for oil changes. All of the vans needed windshield wipers which cost $24 per van. The total bill was $432 . Write an equation to find out what each oil change cost . Solve the equation.
8×24=192-432=240÷8=$30