How to write 25.784 in expanded form

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?

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3