I don’t even know what I’m looking at... can someone help?? This stuff is timed to I would really appreciate it!

Can someone me and plz do the problem

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

On the day a coffee shop first opened, it had 140 customers. 65% of the customers ordered a large coffee. how many customers ordered a large coffee? enter your answer in the box.