Who can me with substitution , elimination methods.

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Which of the following represents a function? 50 !

Emily works as a painter. for each job, it takesher 30 minutes to prepare an interior wall ofa house before she paints and 2 minutes persquare yard to paint that will. the graph belowshows the total time it would take her to do a job,based on the total area of the wallhow long does it take her to do a job when she paints a wall with an area of 15 square yards?