PLZ HELP ME WITH THIS IT DUE TODAY and explain 1 is the first image question

2 is second image question

Part 2 :
1.-(-½ )-3(-2)

2.-20 ÷ (4 − (10 − 8))

3. -(7-9)-2[-5-(-9)]

Evaluate each expressions below.

4.-3x8-2x7-8x9

5. 4[30-(10-2)x3]

What is the average diastolic blood pressure for adults

Determine domain and range, largest open interval, and intervals which function is continuous.

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?