How long will it take money to triple at an apr of 6.6 % compounded annually

Solve the system of equations. y= 2x y= x^2 - 15

Which of these triangle pairs can be mapped to each other using two reflections?

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2