Answer:
A standard deck of cards has 52 cards.
probability of king is 4/52 and probability of a queen is 4/52
so if you do 4/52 + 4/52 = 8/52
8/52 in simplest form is 2/13
Step-by-step explanation:
Hope this helps Have a nice day
So I'm not totally sure but I got -15.32
So sorry if it's wrong!!
It will be 21/40
probability getting both white marbles
3/8×4/10=12/80
probability getting both black marbles
5/8×6/10=30/80
12/80+30/80=42/80= 21/80
Micah was asked to add the following expressions:

First, he combined like terms in the numerator and kept the common denominator
First step is correct. He added the like terms in the numerator, because the denominators are same.

So he got , 
In the next step, he cannot cancel out x^2 from the top and bottom . Because x-4 and 3x+2 are added with x^2
If we have x^2 is multiplied with other terms at the top and bottom , then we can cancel out x^2.
So Micah added the expression incorrectly. Final answer is not correct.