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Furkat [3]
3 years ago
7

-4xy if x is 4 and y is -5

Mathematics
1 answer:
Mars2501 [29]3 years ago
7 0

Answer:

-5

Step-by-step explanation:

-4xy

-4+4-5

-5

Hope this helped! :)

P.S. You might wanna practice PEDMAS for it is in this equation. ;)

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Step-by-step explanation:

Given: BK is an angle bisector of Δ ABC. and line KM intersect BC such that, BM = MK

TO prove: KM ║AB

Now, As given in figure 1,

In Δ ABC, ∠ABK = ∠KBC (∵ BK is angle bisector)

Now in Δ BMK, ∠MBK = ∠BKM (∵ BM = MK and angles opposite to equal sides of a triangle are equal.)

Now ∵ ∠MBK = ∠BKM

and  ∠ABK = ∠KBM

∴ ∠BKM= ∠ABK

Therefore AB ║KM (∵ ∠BKM= ∠ABK and BK is the transversal line)

Hence proved.  

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