What is the equation of a circle centered at the origin with radius 15?

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

Which value is not a solution of 8x^3 – 1 = 0

What is the missing step in this proof ?