Answer:
a = 12 units
Step-by-step explanation:
Equation given is ![a^2 + 16^2 = 20^2](https://tex.z-dn.net/?f=a%5E2%20%2B%2016%5E2%20%3D%2020%5E2)
First we have to evaluate the powers.
=
=![256](https://tex.z-dn.net/?f=256)
=
=![400](https://tex.z-dn.net/?f=400)
So we can now write the equation again as:
![a^2 +256 =400](https://tex.z-dn.net/?f=a%5E2%20%2B256%20%20%3D400)
Now we have to undo the addition,
![a^2=400-256](https://tex.z-dn.net/?f=a%5E2%3D400-256%20)
![a^2=144](https://tex.z-dn.net/?f=a%5E2%3D144%20)
Now we have to find the square root of
to get the value of ![a](https://tex.z-dn.net/?f=a)
![\sqrt{a^{2}} = \sqrt{144}](https://tex.z-dn.net/?f=%5Csqrt%7Ba%5E%7B2%7D%7D%20%3D%20%5Csqrt%7B144%7D)
or
But the length of a leg cannot be a negative value, so we can take the +12.
a = 12 units
Yeah for this one you can simply subtract 8 from both sides, and then divide by 2 to find x!! for the advice portion, i would say make sure you’re not over-complicating things!!
For L to be parallel to M, then 7x - 7 must be equal to 4x + 14, as they are alternate angles along 'parallel lines'.
Thus, 7x - 7 = 4x + 14
3x = 21
x = 7
<span>the answer is c. this is the correct answer because the attack on Pearl Harbor killed many Americans, and was the event that caused the US to finally enter the world war</span>