Question 1031908
M = max number of people allowed
g = number of guests per student invited


There are 40 students. Each of those 40 students can invite g students. So there are 40*g = 40g guests total


Overall, there are 40+40g students plus their respective guests. This number cannot go higher than 1120, so


{{{40+40g <= M}}}


{{{40+40g <= 1120}}}


The final answer is answer choice D