The problem on the left is going to be 1 tens and 8 ones, so 18.
The problem on the right is going to be 2 tens and 9 ones, so 29.
Answer:
<u><em>x=3.4</em></u>
Step-by-step explanation:
Use the Pythagorean theorem:

a and b are the legs and c is the hypotenuse (x)*
Insert the values:

Simplify exponents

Simplify addition:

Find the square root:


Finito.
*The hypotenuse is the side opposite the 90° angle and the longest side of a triangle, always.