Solve the system below by the elimation
7x+2y=24
8x+2y=30

x = 6

y = -9

Step-by-step explanation:

multiply first equation by -1

-1 ×(7x +2y)= 24 ➡ -7x-2y = -24

now add this to the second equation

-7x-2y +8x +2y = 30-24

x = 6

use thus value to find y

8×6 + 2y = 30 ➡2y = 30-48

y= -9

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! )

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step-by-step explanation: