What is 6V5 + 3V5 = and please explain how if you can.

If jaime wants to find 60% of 320, which table should he use?

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

8.74 rounded to the nearest whole number