On Monday, 343 students went on a trip to the zoo. All 8
buses were filled and 7 students had to travel in cars. How many students were
in each bus ?

42

Step-by-step explanation:

343-7 equals to 336

divide it by 8, for 8 buses, there would be 42 in each bus

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.