stephs weight in kilograms is 2x+9 kyles weight in kilograms is 4x-7 write down an expression in terms of x for the mean of their weights

Question

I don’t understand the question

Answer 1

"Mean" means AVERAGE.  So,

1) write an expression that adds the two weights given above (each is an expression)

2) now write the same expression, either divided by two; simplify.

 

DONE, because you just "took the average of two quantities."