Su is the only child under 12 years of age, therefore, she is only child entering for free.
Answer:
x=πn, n∈Z
Step-by-step explanation:
if sin²2x=1-cos²2x, then
1-cos²2x-2cos2x+2=0; ⇒ cos²2x+2cos2x-3=0; ⇔ (cos2x+3)(cos2x-1)=0;

The answer is 12.
57 + 39 = 98
98 divided by two is equal to 12.
This can also be shown by multiplication. 12x8=96
I hope this helped you! :)
There is no way to know unless you were given a row number or number of seats in a row
Answer:
16
Step-by-step explanation: