Abag contains 10 marbles: 2 are green, 5 are red, and 3 are blue. ivan chooses a marble at random, and without putting it back, chooses another one at random. what is the probability that the first marble is red and the second is blue? write your answer as a fraction in simplest form.

Ok if you think about it this way there is a total of ten, and you can turn any color combined with the total to make a fraction so 2/10 5/10 3/10. so at normal theres a 50% chance that ivan is going to pull out a red one, and a 30% chance of him pulling a blue. 6/10 probs or if you want to be technical about it its 60%

So basically the perimeter of a parallelogram is

2*length + 2*width

Or, in this case, once you substitute everything in,

2 * (3x + 9) + 2 * (4x - 5)

Use the distributive property, to distribute the 2s to everything inside the parenthesis.

2 * 3x + 2 * 9 + 2 * 4x + 2 * -5

6x + 18 + 8x - 10

Then just add everything

14x + 8 = perimeter