Help me with this please

Moira has a canvas that is 8 inches by 10 inches. she wants to paint a line diagonally from the top left corner to the bottom right corner. approximately how long will the diagonal line be?

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers

If f(x)=x+7 and g(x)=1/x what is (fog)(x)