Answer:
x^ -10
Step-by-step explanation:
x^2 * x ^ -12
We know that a^b * a^c = a^ (b+c)
x^2 * x^-12
x^(2+-12)
x^ -10
An Easy Way to do this is to write out the sample space.
5 10
5 25
10 5
10 25
25 5
25 10
Then, check which ones, add to over 20
5 25
10 25
25 5
25 10
Therefore, it's 4/6 or 2/3
