W + 3z + 5w + 2z

combine like terms to simplify the following expressions

Pls i’m too dumb to know what i’m doing right now

Write the expression 7x^3-28xy^2 as the product of 3 factors

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