Ihave no idea how to even get this. !

h = 22.4

Step-by-step explanation:

Hey there!

Actually, this is VERY easy :)

Just follow the steps and statements, and memorize the formulas below :

This is a triangle and the sides next to the "h" are 30ft and 20ft. Now, in a triangle, we can have something called a hypotenuse which is the longest side in any triangle. Sometimes, there may be an unknown value for the hypotenuse and we would have to solve for it by a very simple formula as shown below. We might also have to solve for a side when the value of the hypotenuse is given.

To solve for the hypotenuse we use this formula :

hyp² = side² + side²

To solve for the side we use this formula :

side² = hyp² - side²

Here we do the opposite of finding the value of the hypotenuse.

Now let's calculate the value for "h" now that we know it's a side.

h² = 30² - 20²

h² = 900 - 400

h = 500

But this isn't the final answer. To get the final answer we have to find the square root of 500.

Therefore "h" is 22.4

To find out if the answer was correct :

22.4^2 + 20^2 = 901.76. (we should get back 30 if the answer was correct)

Square root of 901.76 = 30.0

So, the answer is 100% correct.

bn,mn,n.vn.

step-by-step explanation:

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8