Which expression is a sum of a number and a product A 3+5x
B 5x
C 5(x-3)
D 5+ x -3
PLS HELP

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

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