Y is less than or equal to -1
Number 2 is “division into zero property”
Number 3 is “identify property of division”
Number 4 is “-48xy”
We know that 3/10*20=6 students are eating salads.
We also know that 3/5*20=12 students are eating sandwiches.
Assuming each person only eats one thing, there are 20-12-6=2 students eating lunches other than salads or sandwiches.
What angle are you talking about