Help me please for a test

 y = 24

Step-by-step explanation:

you need the pythagorean theorem(a^2 + b^2 = c^2)

so we have the hypotenuse so we plug in what we knowwhich is:  

10^2 + b^2 = 26^2     ->    100 + b^2 = 676

then solve for b^2

b^2 = 576   -> = 24

answer: this is not a question

step-by-step explanation: this is a answer