Help pleases

Donald has x twenty-dollar bills and 1 ten-dollar bill. how much money does donald have? write your answer as an expression.

Natural minor half steps between scale degrees 3 and 4; 7 and 8 harmonic minor half steps between scale degrees 2 and 3; 5 and 6 ascending melodic minor half steps between scale degrees 2 and 3; 5 and 6; 7 and 8 major half steps between scale degrees 2 and 3; 7 and 8

Reflects the pros and cons of continuous software updating?