Answer:
4
Step-by-step explanation:1.trust me
2.it will be it
3.just do it
The answer would be C because they say if 3 new students arrived each year.
Half of 2/3 is:

This means that 1/3 was left. This also means that they ate 1/3 of the lasagne.
Model diagram can be seen in attachment.
Answer:
Make -3 a fraction
Step-by-step explanation:
3/4 x -3
3/4 x -3/1
3/4 x -12/4
-72/4 = 18