You need to prepare 50g of an ointment with 15% of zinc oxide. However, your pharmacy has no zinc oxide powder and the only thing you have is two lots of zinc oxide ointment containing, respectively, 50% and 5% of zinc oxide.
1. How many grams of the 50% ointment you need to prepare this formula?

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

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?

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.