SHOW ALL OF WORK. Find missing length, round to the nearest tenth if necessary.

144 or 72^2

Step-by-step explanation:

You have one leg a 5 and the other leg we don't know, well we know the hyponuse is a 13.

So the first step is

A^2 + B^2 = C^2

2 step,

5^2 + B^2 = 13^2

3 step

5 x 5 = 25 and 13 x 13 = 169

25 + B^2 = 169

4 step

169 - 25 = 144

144 divided by 2 is 72, so 72 x 72 is 144.

If you have an answer 72 squared or 144 both will work.

It does not help that you don't give the answers.

Neither set A nor set B represents a function.  

Step-by-step explanation:

According to the definition of a function, for each input there exists a unique output. In other word for each value of x there exists unique value of y.

In set A we have four ordered pair (-4,5),(1,-1),(2,-2) and (2,3).

It means for x=2, we have two values of y, i.e., -2 and 3.

Since for a single value of x there exist more than one value of y, therefore set A is not a function.

In set B we have four ordered pair (2,2),(3,-2),(9,3) and (9,-3).

It means for x=9, we have two values of y, i.e., -3 and 3.

Since for a single value of x there exist more than one value of y, therefore set B is not a function.