Are the triangles similar? if so, what postulate or theorem proves their similarity?

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

Astore is having a sale in which all items are reduced by 20 percent. including tax, jennifer paid $21 for a pair of shorts. if the sales tax is 5 percent, what was the original price of the shorts

Solve the system of equations. 2x-2y=-4 and x+y=8. show work