What is the vertex of the graph of this equation y=-3x2 - 12x- 9?

The system of equations graphed below has how many solutions? y = 2x + 2

Which expression and diagram represent “renee biked four times as far this month as last month”?

Answer this two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: two right triangles abc and edc have a common vertex c. angle abc and edc are right angles. ab is labeled 13 feet, ac is labeled 15 feet, ec is labeled 10 feet, and ed is labeled 4 feet.what is the approximate distance, in feet, between the two poles? 11.14 feet16.65 feet14.35 feet15.59 feet