Which could be the entire interval over which the function, f(x), is positive?

O, 1)
O (-2, 1)
O(-0, 0)
O (1.4)

Acarnival sold tickets for $1.50 for adults and $1.00 for students. there were 54 tickets sold for a total of $70.50. write a system of equations to represent the number of adult tickets, x, and the number of student tickets, y. find the solution and explain what it means. i'll you if you me

I'm confused on this could anyone me and show me what i need to do to solve it.

Solve 2 - 3 cos x = 5 + 3 cos x for 0° ≤ x ≤ 180° a. 150° b. 30° c. 60° d. 120°