321 adult tickets were sold use the formula to solve
108 student tickets were sold
Step-by-step explanation:
<u>I</u><u>d</u><u>e</u><u>n</u><u>t</u><u>i</u><u>t</u><u>y</u><u> </u><u>u</u><u>s</u><u>e</u><u>d</u><u> </u> :


so we got :
y = 2
z = 3

<u> </u>
No the total angle is supposed to be 180