Can someone help me with this one I am really confused with how it works:

-9x-x^2​

Ill mark the brainliest if you me with the these three questions 7,8,9

Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3

What 620000 divided by 10 to the third power