Based on the diagram below, which of the following must always be true? a.) m< 1 = m< 2
b.) m< 1 = m< 3
c.) m< 1 + m< 2 = m< 4
d.) m< 1 + m< 3 = m< 4

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Can someone me and do the problem plz so i can understand it more better

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.