Let the thickness (or the depth) of the shown figure = t
Total surface area =
=

= 10.6875 + 12.5
= 23.1875
∴ Volume = 23.1875 t
Answer:
3x+8y+13x= 16x+8y= 8×(2x+y)
Find the ticket unit cost: divide the total paid, $324, by the number of tickets, x. Then the form of the unit cost is
$324
--------- .
x
This question is highly unusual in that you write "x" as the number of tickets sold, instead of a specific number of tickets. Supposing that you'd sold 100 tickets for $324, then the unit cost would be, much more typically, a numeric ratio:
$324
----------------- = $3.24/ticket
100 tickets
Recall that cos = adj / hyp, yields cosx = 21 / 29.