In y = 2x + 3, 3 represents the fixed cost and 2 represents the cost-per-mile.
The per mile charnge, in dollars per mile, is $2/mile (answer)
Your answer would be either A...or D.
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Solve the trigonometric equation:
Make a substitution:
and the equation becomes
Rewrite conveniently
– t as
+ t – 2t, and then factor the left-hand side by grouping:
Factor out
2t + 1:
Substitute back for
t = cos x:
Therefore,
where
k is an integer.
Solution set:
I hope this helps. =)
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√(-√2-(-√2))²+(√3-2√3)²= 3