Question

1 y 25 is divisible 9 if y = ______ a)0 b)1 c)2 d)3

Answer 1

Step-by-step explanation:

Let the number of cows be x and their legs be 4x.

Let the number of chicken be y and their legs be 2x.

Total number of legs = 4x + 2y.

Total number of heads = x + y.

The number of legs was 14 more than twice the number of heads.

Therefore, 2 × (x + y) + 14 = 4x + 2y.

or, 2x + 2y + 14 = 4x + 2y.

or, 2x + 14 = 4x [subtracting 2y from both sides].

or, 14 = 4x – 2x [subtracting 2x from both sides].

or, 14 = 2x.

or, x = 7 [dividing by 2 on both sides].

Therefore, the number of cows = 7.

Answer 2

$1y25$

if it would be divisible by 9 then the sum would be divisible by 9

$1 + y + 2 + 5 = 9$

$y + 8 = 9$

$y = 1$