Select which type of polygon this figure is, and determine whether it's convex or concave.
a. quadrilateral; convex
b. pentagon; concave
c. hexagon; concave
d. pentagon; convex
e. hexagon; convex

Anne is twice as old as bill, and bill is 3 years older than christie. the sum of anne s and christie s ages equal 72. find their age difference.?

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 $

Ten times the square of a non-zero number is eqaul to ninety times the number