Question

b) In a zoo, there are ducks and deer. If the total number of heads is 200 and the
total number of legs are 570, and then find the number of deer.

Answer 1

Answer:

35

Step-by-step explanation:

x+y=200

and 2x+4y=570

so 2x+4y=570 multiplied by 1

x+y=200 multiplied by 2

2x+4y=570–2x+2y=400

result is –2y=–70

y=–70/–2

is equal to 35

Answer 2

Answer:

85 deers

Step-by-step explanation:

85 deers× 4 legs= 340

115 duck × 2 legs = 230

total =570