An expression is shown below: 10n3 − 15n2 + 20xn2 − 30xn part a: rewrite the expression so the gcf is factored completely. (4 points) part b: rewrite the expression completely factored. show the steps of your work. (6 points)

answer:

given 3x^3y + 12xy − 9x^2y − 36y

a) 3y ( x^3 + 4x - 3x^2 - 12)

b) 3y [   x( x^2 + 4) - 3(x^2 + 4) ]

3y (x-3) (x^2+4)

step-by-step explanation:

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

your answer is d 2,500

step-by-step explanation: