Help me please someone for brainliest

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

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