richard and teo have a combined age of 50 richard is 14 years older than twice that age. how old are richard and teo

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

Which answer is the solution set to the inequality |x|< 9? a. x< -9 or x> 9 b. x> -9 and x< 9 c. x> -9 or x< 9 d. x< 9 and x< 9

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup