PLEASE HELP!!

Find the area of the sector.

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

Which number completes the system of linear inequalities represented by the graph? y> 2x – 2 and x + 4y 2 et 2 3 4

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)