Step-by-step explanation:
Answer:
-3
Step-by-step explanation:
you can divide the second term by the first term to solve
39/-13 = -3
then, I like to check that this fits with the third term
39*-3 = -117
so the common ratio is -3
You could write 42/20 for #60.
Answer:
Step-by-step explanation:
The blue line represent the full line length.
We can add the parted black segments together and set it equal to the line.
The odds of getting a red first is 5/12. the odds of getting a green second is 7/11. the probability of both is then 5/12 * 7/11, or 35/132
