Answer:
The value of y is 20 when x = 15 <em> i think</em>
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Step-by-step explanation:
36 because the rest are prime #'8
Answer:
The amount of popcorn needed to fill the paper cone is 
Step-by-step explanation:
we know that
The volume of a cone is equal to
In this problem we have
substitute
So there is an identity we'll need to use to solve this:
cos(x+y) = cosxcosy - sinxsiny
replace the numerator with the right hand side of that identity and we get:
(cosxcosy - sinxsiny)/cosxsiny
Separate the numerator into 2 fractions and we get:
cosxcosycosxsiny- sinxsiny/cosxsiny
the cosx's cancel on the left fraction, the siny's cancel on the right fraction and we're left with:
cosy/siny - sinx/cosx
which simplifies to:
coty - tanx
It does not matter what order it is in when using addition.
