Anyone plzz me with 9-12 i don’t understand this i need it’ll be much appreciated plzzz

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

Find two numbers if their sum is 91 and the ratio is 6: 7?