Can you please Solve for X on both pictures?

What is the difference between regular convex and concave polygons

Find the measure of angle b in the following triangle

Carli has 90 apps on her phone. braylen has half the amount of apps as theiss. if carli has three timesthe amount of apps as theiss,how many apps does braylen have? let b represent the number of braylen's apps and t represent the number of theiss's apps.