What is (-3)+(-7)=x
-3+-7=x

The answer is -10.

Step-by-step explanation:

3+7= ten right? Notice that the numbers have negitive signs?

If the numbers are BOTH negitives than it stays a negitive! If the positive is more than the negative then the answer if positive.

(Ex. -5+8=3)

If the negative if more than positive then the answer will be negitive!

(EX -7+5=-2)

the answer   is 200

step-by-step explanation:

this is a problem about poisson probabilities.   i don't know if you've

already studied poisson distributions, or if you have a place to look

to read more about the subject.  

here's how you can see a poisson distribution coming.   when there are

a lot of events that may happen at any time (or any place), and when

you're counting how many of them happen at a particular time (or a

particular place), and each event is independent of the others, then

the result is a poisson distribution.   this is roughly true for the

chocolate chips; one chip being in a cookie has only a small effect on

the probability that another chip will be in the cookie.

once you know you have a poisson distribution, you know a lot.   there

is only one parameter to a poisson distribution, so if you know the

mean, you know everything.   the form of the distribution is

  probability of n chips = {[e^(-x)]*(x^n)} / (n! )