I believe ur question is uncomplete.
nvm i got it, 20 right?
yeah ok, CPhill's solution is better lol
x is an exterior angle, there is a rule that says
so x = 29 + 82 = 111
\(\:z=\frac{1}{2}-i\frac{\sqrt{3}}{2}\)
so \(z^{12}+\:\frac{1}{z^{12}}\) i belive is 2
Step by step:
\(5x+14=k\)
\(5x=k-14\) (subtract 14 from both sides)
\(x=\frac{k-14}{5}\) (divide both sides by 5)
idk if this is right
\(x=\frac{9+\sqrt{519}}{6},\:x=\frac{9-\sqrt{519}}{6}\)
We can solve this with proportions:
\(\frac{4}{10}=\frac{14}{x}\)
cross multiply: \(4x=10\cdot \:14\)
\(4x=140\)
\(x=35\)
35 dollars
