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babunello [35]
3 years ago
12

!!PLEASE HELP!! I WILL MARK U 5 STARS AND EVERYTHING

Mathematics
2 answers:
Sholpan [36]3 years ago
7 0

Answer:

line 3 hope it helps :)

sdas [7]3 years ago
7 0

Answer:

Line 3

Step-by-step explanation:

In Line 3, there is part of the expression:

(2x²)(6x)

He added the two terms together, in which he was supposed to multiply.

(2x²)(6x) = 12x³

~

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There is an animal farm where chickens and cows live. All together, there are 84 heads and 210 legs. How many chickens and cows
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1 Chicken have = 2 legs

1 Cow have = 4 legs

No of cows = x

No of chickens = y

Total no of legs = 4x + 2y = 210.............(1)

Total No of heads = x + y = 84................(2)

x = 84 - y....( from (2) )

Substituting the above equation in (1)

4 ( 84 - y) + 2y = 210

336 - 4y + 2y = 210

336 - 2y = 210

-2y = -126

= y = 63

No of cows = 84-63 = 21

∴ <u><em>Total no of cows = 21</em></u>

<u><em>Total no of chickens = 63</em></u>

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