Part 1: Flipping a coin
A fair coin has 22 sides (heads and tails) that are equally likely to show when
the coin is flipped
What is the theoretical probability that a fair coin lands on heads?
P\left( \text{heads) \right)=P (heads) =

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

substitute,

circle 1 = 5

circle 2 = 20

circle 3 = 44

in this case no matter how you add, you will always get a perfect square..

hence proved

happy to

pls mark as brainliest

11) obtuse

13)right

15) acute