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KIAZTUNEZ
09.07.2019 •
Mathematics
Karan needs to choose between two gym plans. he can either pay a $150 joining fee and a $10 monthly fee, or he can pay a $50 joining fee and a $30 monthly fee. on what month will the cumulative costs of the plans be equal, and what will those total costs be karan will pay a cumulative cost dollars with either plan to go to the gym for months.
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Ответ:
Let x be the month on which the fee for two plans are equal.
Therefore,
150 + 10x = 50 + 30x
10x - 30x = 50 - 150
-20x = -100
x = 5
Cumulative cost = 150 + 10(5)
= 150 + 50
= 200
Hence, Karan will pay a cumulative cost of $200 dollars with either plan to go to the gym for 5 months.
Ответ:
Hi!
Let's first expand the cotangent of theta.
You'll probably know that tangent will be "y/x", or
, and cotangent is the reciprocal of this, meaning that it is "x/y" or
.
That means that we are now given this equation.
That'll multiply to:
We'll want a common denominator to add by multiplying
to both top and bottom of the second term:
Pythagorean Identity states that
, so substitute that in:
Which simplifies to:
Hope this helps!