At the movie theatre, child admission is 6.20 and adult admission is $9.90. On Tuesday, four times as many adult tickets as child tickets were sold, for a total sales of $1419.80. How many child tickets were sold that day?

31

Step-by-step explanation:

For every 4 adult tickets sold, only 1 child ticket was sold.  So the cost of 4 adult tickets and 1 child ticket is:

4 x 9.9 + 1 x 6.2 = 45.80

Divide the total sales by 45.80:  1419.80 ÷ 45.80 = 31

So there were 31 lots of "4 adult tickets and 1 child ticket" sold.

Therefore, there were 31 x 4 = 124 adult tickets sold

                              and  31 x 1 = 31 child tickets sold

a.   since the profit made in 2012 is equal to the profit made in 2014, the profit is symmetric about the line y = 120,000.

step-by-step explanation:

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