All 231 students in the math club went on a field trip. some student rode in vans which hold 7 students and some students rode in buses which hold 25 students each. how many of each type of vehicle did they use if there were 15 vehicles total?

7 buses

8 vans

Step-by-step explanation:

We know that out of 231 students, some student rode in vans which hold 7 students and some students rode in buses which hold 25 students each so we can write an equation:

7V + 25B = 231 --- (1)

And since there were 15 vehicles in total:

V + B = 15 --- (2)

V = 15 - B

Substituting the value of V in (1):

7(15-B) + 25B =231

105 - 7B + 25B = 231

18B = 126

B = 7

Substituting this value of B in (2):

V + 7 = 15

V = 8

s

step-by-step explanation: