What is the sum?

-5 + (20) =

Nell has a sales clerk job that pays $12 per hour for regular gas work hours. she gets double time for any hours over 40 that she works in a week. how many hours did nell work if her weekly pay was $744

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

Prove that 16^4-2^13-4^5 is divisible by 11.