The equation of a parabola is given. y=−16x2+7x−80 what is the equation of the directrix of the parabola?

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.