What is the vertex of y=5x^2+1

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

What is the equation of the line that is parallel to the line with the equation y= -3/4x +1 and passes through the point (12,-12)