C is the answer
Dmmssmsmsmxmxxmxm
There is only one real root, at x=-2, so the polynomial describing this parabola has factors of (x+2) with multiplicity 2. The y-intercept tells you the vertical stretch is 1.
The factorization is y = (x +2)².
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
Hey there! :D
Since all the terms are being added together, and there is a common denominator with the fractions, we can just add them.
x+x= 2x 3/4+2/4= 5/4
2x+5/4
2x+1.25<== simplest form
I hope this helps!
~kaikers
I think the answer is 10.3%
