Cho số thực k ∈ R, hãy viết số phức sau dưới dạng nhị thức

Z=(1+ki)/{2k+(k^2-1)i}

3. solve the given inequality and graph the solution on a number line.

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Two lines meet at a point. set up and solve an equation to find the value of x