There are a total of 60 permutations makeable from those letters 3 at a time.
Let
x-------> the length side of the poster
y-------> the width side of the poster
we know that
Area of the poster is equal to
-------> equation 
Area of the printed area is equal to
----> equation 
substitute equation in equation
![Aprinted=[210]-3x-2*[\frac{210}{x}]+6](https://tex.z-dn.net/?f=%20Aprinted%3D%5B210%5D-3x-2%2A%5B%5Cfrac%7B210%7D%7Bx%7D%5D%2B6%20%20)
using a graph tool
Find the vertex of the graph
The vertex of the graph is the point that represent the value of x for the largest printed area
see the attached figure
the vertex is the point 
the largest printed area is 
find the value of y
therefore
the answer is
The dimensions of the poster are 
Answer:
£90
Step-by-step explanation:
Let M = Malachy's share
and P = Paul's share
and B = Brian's share.
We have three conditions:
(1) M = 2P
(2) P = 3B
(3) M + P + B = 150
Solve for B:
Substitute (2) into (3) (4) M + 3B + B = 150
(5) M + 4B = 150
Substitute (2) into (1) M = 2(3B)
(6) M = 6B
Substitute (6) into (5) 6B + 3B + B = 1 50
(7) B = 15
Solve for P:
Substitute (7) into (2) P = 3×15
(8) P = 45
Solve for M:
Substitute (8) into (1) M = 2×45
M = 90
Malachy gets £90.
y=mx+b
slope is also m
b is the y-intercept
-3x+y=7
move -3x to the other side
sign changes from -3x to +3x
-3x+3x+y= 3x+7
y= 3x+7
Answer:
3
