Answer:
64 cm
Step-by-step explanation:
The answer is 6.4 I hoped this helped
The value of n is 4 and yz is 1 if y is between x and z i.e. if y, x and z are collinear points.
According to the given question.
We have some linear equations.
xy = 4n + 3
yz = 2n - 7
and
xz = 20
Since, y is between x and z. Which means y, x and z are collinear points.
Therefore,
xy + yz = xz
⇒ 4n + 3 + 2n - 7 = 20
⇒ 6n -4 = 20
⇒ 6n = 20 + 4
⇒ 6n = 24
⇒ n = 24/6
⇒ n = 4
Therefore,
yz = 2n - 7 = 2(4) - 7 = 8- 7 = 1
Hence, the value of n is 4 and yz is 1 if y is between x and z i.e. if y, x and z are collinear points.
Find out more information about collinear points here:
brainly.com/question/1593959
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let's proceed to graph each case to get the answer
using a graph tool
case a) 
see the attached figure N 1
The equation is not represented by the graph
case b) 
see the attached figure N 2
The equation is not represented by the graph
case c) 
see the attached figure N 3
The equation is represented by the graph ------> Is the solution
case d) 
see the attached figure N 4
The equation is not represented by the graph
therefore
the answer is
the equation is
