5 − 2x + 2 = 12
work below hurry!!

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?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Long division the problem is 40 ➗ 348 = ?