Answer:
Fraction form: 1/729
Decimal form: 0.00137174...
Exponent form: 3^-6
Not sure why such an old question is showing up on my feed...
Anyway, let

and

. Then we want to find the exact value of

.
Use the angle difference identity:

and right away we find

. By the Pythagorean theorem, we also find

. (Actually, this could potentially be negative, but let's assume all angles are in the first quadrant for convenience.)
Meanwhile, if

, then (by Pythagorean theorem)

, so

. And from this,

.
So,
Answer:

Step-by-step explanation:

X+y=27
x=2y
2y+y=27
y=9
x=27-y
x=27-9=18
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- 5 dollars, the V thing sits on top of the line and 5 comes after signifying that it could be 5 dollars or more