## Algebra 1: Common Core (15th Edition)

$y=7$
Starting with the pythagorean theorem, we have: $24^{2} + y^{2} = 25^{2}$ $\implies 576 + y^{2} = 625$ We now subtract 576 from both sides: $\implies y^{2} = 49$ Take the square root $\implies y=7$