Write cubed root of x2 using a fractional exponent

How do you use the elimination method for this question? explain, because i really want to understand!

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?