Which equation represents the following quadratic equation written in vertex form? x2 + 4x - 2= 0

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters .

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?

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?