For a class trip, the teachers would like to have one adult for every 10 students. there are 190 students on the trip. how many adults should go on the trip

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!