Help with these 2 question and I with give 36 points away and brainliest (pics included)... Only 1 & 2 pls

Solve the equation for b: a= (1/2)(b)(h)

△abc is similar to △xyz. also, side ab measures 6 cm, side bc measures 18 cm, and side xy measures 12 cm. what is the measure of side yz ? enter your answer in the box.

Suppose you can spend at most $12. create an inequality that represents this restraint. then find at least three ordered pair solutions representing the number of boxes of candy and combos you can buy