HELP for the function f defined by f(x)=3x^3-2x+5 find f(-x), -f(x), and -f(-x)

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?