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Mathematics
Mathematics
Problem
Quadrilateral
P
Q
R
S
PQRS
P
QR
S
has vertices
P
(
1
,
4
)
,
Q
(
3
,
2
)
,
R
(
4
,
5
)
P(1,4),\;Q(3,2),\;R(4,5)
P
(
1
,
4
)
,
Q
(
3
,
2
)
,
R
(
4
,
5
)
and
S
(
5
,
1
)
S(5,1)
S
(
5
,
1
)
. Which vertex lies on both lines
x
+
y
=
5
x + y = 5
x
+
y
=
5
and
2
x
−
y
=
4
2x - y = 4
2
x
−
y
=
4
? a)
P
P
P
b)
S
S
S
c)
Q
Q
Q
d)
R
R
R
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