Question

PLEASE HELP ME!

Answer 1

Answer:

54

Step-by-step explanation:

Let number of adult tickets sold be $a$

Let number of children tickets sold be  $c$

139 tickets were sold:

we can write:

$a+c=139$

a total sales of $972.00:

we can write:

$5.4c+9.5a=972$

Now solving for $c$ in the first equation and substituting that into 2nd equation, we can solve for $a$, what we need. So:

$c=139-a\\-------\\5.4c+9.5a=972\\5.4(139-a)+9.5a=972\\750.6-5.4a+9.5a=972\\-5.4a+9.5a=972-750.6\\4.1a=221.4\\a=54$

Hence 54 adult tickets were sold.