There are 3 times as many students participating in the hiking trip this year than last year. There are 42 students on the trip this year. Write an equation that represents the number of students that came on the hiking trip last year.

3x=42

Step-by-step explanation:

42 is how many there were last year tripled

x is how many there were last year

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.