What is the value of (2mn^4)^4

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?

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1