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

loloo

step-by-step explanation:

lololool

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb