How do i do this? can you me plz thx.

Step-by-step explanation:

First you have to set up the equation:

The statement says three tickets in Japan plus two tickets in Switzerland cost 89.59

You can set up the first equation this way:

Next similarly the second equation will be:

And you solve the sistem of two equations.

you should at least use a calculater

step-by-step explanation:

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify