Given f(x) = 3/2x - 5 and g(x) = x^2 + 2x solve for g(-2)

Solve the equation w^3 = 1,000 i honestly dont know how to punch this into a calculator pls

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?