Free brainliest! ** ** use the equation to find the length of the missing leg measure. a^2 + 16^2 = 20^2 1. evaluate powers: a^2 + 256 = 400 2. undo addition: a^2 = 144 3. undo the square: a= 144 ( square root ) what is the length of the missing leg measure? a = units

a = 12 units

Step-by-step explanation:

a = 12 units

Step-by-step explanation:

Equation given is

First we have to evaluate the powers.

= =

= =

So we can now write the equation again as:

Now we have to undo the addition,

Now we have to find the square root of to get the value of

 or

But the length of a leg cannot be a negative value, so we can take the +12.

a = 12 units

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.