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77julia77 [94]
3 years ago
15

Required

Mathematics
2 answers:
sattari [20]3 years ago
5 0

Answer:

50

Step-by-step explanation:

d-nr of ducks

g- nr of goats

2*d+4*g=260

d+g=80            /*(-2)

2d+4g=260

-2d-2g=-160

------------------

      2g=100

      g=100/2

     g=50

avanturin [10]3 years ago
4 0

Answer:

<h2>50</h2>

Option D is the correct option

Solution,

Let no.of ducks be X

Let no.of goats be y.

Total heads= X+y=80 ➡️ equation (i)

Total legs= 2x+4y=260➡️ equation (ii)

X= 80-y

2(80 - y) + 4y = 260 \\ or \: 160 - 2y + 4y = 260 \\ or \: 160  + 2y = 260 \\ or \: 2y = 260  - 160 \\ or \: 2y = 100 \\ or \: y =  \frac{100}{2}  \\ y = 50

Number of goats= 50

Hope this helps...

Good luck on your assignment...

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