The answer would be 32. :)
Answer:
it should be 45°, but I haven't learned it jet
Is this a true/false? if so, it's true. (Only SAS, SSS, ASA, and AAS prove congruency between triangles).
Hope it helps <3
Factor this by grouping. Group the first two terms together and then the second 2 terms together. The idea here is that, after grouping, what you can pull out in both groups is the same. Like this:

Now work on finding a common thing between the 2 groups:

See, what you have in common there now is the (x-9) that you can factor out:

And that is factored completely.
The general expression would be:

In an organism that is 20,000 years old (t = 20000), we would expect:

This menas there would be around 8.898% of carbon-14 remaining in the organism.