Por que os números -23 e +23 possuem o mesmo valor absoluto?

Ataxi cab charges $1.75 for the flat fee and $0.25 for each time. write an in equality to determine how many miles eddie can travel if he has $15 to spend.

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

The range of the following relation r {(3, -5), (1, 2), (-1, -4), (-1, 2)} is (1 point){-4, -5, 2, 2){-1, 1, 3){-1,-1,1,3){-5, -4,2)