Arianna runs up 4 flights of stairs and then runs down 4 flights of stairs. does this situation represent additive inverses?

The additive inverse of a number is simply the negation of the said number.

The given situation is an illustration additive inverse.

Given that:

Let:

When Arianna runs up, we have:

When Arianna runs down, we have:

---- the minus indicates a downward movement

So, we have:

The additive inverse of a number n is -n

E.g. The additive inverse of 7 is -7

By comparing x and y, we have:

and

Hence, the situation represents additive inverse.

Read more about additive inverse at:

link

Yes this represents additive inverse,

 Since you are subtracting the same number 4 to get to zero.

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

the answer is b.)

< 1=< 2