Can someone me step by step to find the missing number for problem 8 and 9.

For number 8: x=16

Step-by-step explanation:

You will need to use Pythagorean Theorem (a²+b²=c²)for this...

First, focus on the smaller triangle because you already know 2 sides.In order to find the shared side use, 10²+b²=25²simplify to 100+b²=625subtract 100 from both sidesb²=525 (the opposite of squaring something is finding the square root)√b²=√525b=22.9 but round up so b will equal 23 insteadNow you know the height of both triangles! so you can move onto the next triangle :)Use the same equation(a²+b²=c²)23²+b²=28²Simplify to 529+b²=784subtract 529 from both sides :)b²=255√ b²=√ 255b=15.9 but guess what, you can round up to 16! :)There ya go. X=16

2.) is the most sense