Jada purchases movie tickets online. She buys 2 tickets for adults and 4 tickets for children. The cost of a ticket for a child
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Putting the value of Y = 15
So, X = 200
Let <em>f(x)</em> be the sum of the geometric series,
for |<em>x</em>| < 1. Then taking the derivative gives the desired sum,
Combining like terms on the left-hand side gives us Adding 10 to both sides gives
and dividing both sides by 5 gives our answer of