Find the missing side length and round it to the nearest tenth please :)

171

Step-by-step explanation:

This is a Right triangle,

So this means that all the sides should add up to 180,

So far we have 9

So we will have to Subtract 9 from 180 which leaves us with 171,

I hope this is correct!!

question 1: 2x - y = 26

Step-by-step explanation:

Plug in 18 for x and 10 for y.

2x − y = 26 –> 2(18) - 10 = 26 —> 36 - 10 = 26. This is true! 36-10 is 26!

x + y = 18 —> 18 + 10 = 18. This is false. 18+10 is 28, not 18.

2x − 2y = 36 —> 2(18) - 2(10) = 36 —> 36 - 20 = 36. This is false!

x − y = −28 —> 18 - 10 = -28. This is false! The only true equation was 2x − y = 26. So that is your first answer.