X + 1 D
The diagram shows a pentagon.
It has one line of symmetry.
AE = 4x
B В
AB = 2x + 3
BC = x + 1
2x + 3
All these measurements are given in centimetres.
The perimeter of the pentagon is 21 cm.
A
4x
a) Write an equation, in terms of x, for the perimeter of the pentagon.
Your final line should be in the form ax + b = 21 where a and bare
whole numbers.
E
(3)
b) Find the value of x.
(2)
+
Total marks: 5

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! )

1 1/5

step-by-step explanation:

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour

no its the same as every other grade

step-by-step explanation: