There is one integer for which there does not exist another integer with the same absolute value. what is that integer?

Find the area of the unshaded square

Find the distance between (7,-6) and (-3,-9)

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of