Please help me? What does this even mean?

Step-by-step explanation:

AE and CD are the same therefore

B in the middle it 40 degrees both sides

Because it can only add up too 180, you do 180-40= 140

And then 140 divided by 2 = 70 each

So answer is 180 in total

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

sgth thdhtxr ythdsx hfgh ysrth th srtrh

step-by-step explanation:

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