Answer:
10 sandwiches
Step-by-step explanation:
40 / 4 = 10 sandwiches
120 minutes=2 hours
5 1/2 hours multiplied by 60=330
330 subtracted by 210=120 minutes=2 hours
x+z = 1, z = 0
x + 0=1
x = 1
3x+3z= 3
3(1) + 3(0) = 3
3 = 3
The sum of 50 and 6 is the total of 56