A mapping diagram shows a relation, using arrows, between input and output for the following ordered pairs: (negative 3, negativ
e 4), (0, negative 4), (negative 2, 2), (negative 2, negative 1), (1, negative 3), (3, 7).
Which ordered pair needs to be removed in order for the mapping to represent a function?
(–3, –4)
(–2, –1)
(1, –3)
(3, 7)
Which ordered pair needs to be removed in order for the mapping to represent a function?
(–3, –4)
(–2, –1)
(1, –3)
(3, 7)
2 answers:
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Answer:
Step-by-step explanation:
Since AK = KD, then the triangle ABD is isosceles,
Then BD = AB. Denote AB by x and AK by y.
Then,
2x+4y=24 (the perimeter)
cos 60=y/x.
From the second equation we get
Plug in the first equation we get:
We deduce that
Then BD = AB. Denote AB by x and AK by y.
Then,
2x+4y=24 (the perimeter)
cos 60=y/x.
From the second equation we get
Plug in the first equation we get:
We deduce that