3.4 - 2.8d + 2.8d - 1.8

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

What numbers are included in the set of integers? what numbers are not included?

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