600,000+80,000+10 in written form and standard form

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

In the triangle below, what is the length of the side opposite the 60° angle?

Which expression is modeled by this set of arrows on the number line?