The diagram shows OA = a and OB = b a) Write AB in terms of a and b.
Simplify your answer.
Note: Ignore arrows above vectors eg write AB, not AB
b
-a+b
B
b) The point B divides AC in the ratio 2 : 3.
Work out vector OOin terms of a and b.
Simplify your answering

OC=-3/2a+5/2b (it should be correct, sorry if it isn't)

Step-by-step explanation:

OC=OA+AB+BC

OC=a-a+b-3/2a+3/2b

OC=5/2b-3/2a

or

OC=-3/2a+5/2b

question

what is the value of the third quartile of the data set represented by this box plot? a. 19 b. 21 c. 26 d. 29

answer

c

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0