Okay so the first thing you need to do is move the all the variables to one side of the equal sign
Answer:
one side = 
Step-by-step explanation:
if you draw an octagon on a piece of paper, you can draw a square around it, you should be able to see a diagram of this attached, ignore the 6.
Let's say TP = a
since it's a regular octagon, TP = HT
and using the Pythagoras Theorem, we know a² + b² = c² and thus:
√(AT² + HA²) = HT
and since AT = HA which we will call x, the equation becomes:
√(2x²) = HT = a
rearrange the equation to solve for x and you get:
2x² = a²
x² = 
x =
which, if you rationalise the denominator, you get:
x = 
Answer:
-0.8 - 0.5b - 1.4c
Step-by-step explanation:
Take the b and the c away
Then times the 0.2 by all the numbers but don't add them
Once your done you and the b and c back to you equation
Step-by-step explanation:
<h2>
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