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Convert all fractions denominator into 12

3/12 , 8/12, 6/12,  4/12

Hence in order

1/4, 2/6, 1/2, 2/3 

You can use estimation to work out the answer to this question. 21.7 × 9.4 is approximately 22 × 10 = 220. The answer will be the option that is closest to 220, which is option D. 

20

K = C + 8 → C = K - 8

J = K + 5

J + K + C = 72

(K + 5) + K + (K - 8) = 72

3K - 3 = 72

3K = 75

K = 25

J = 25 + 5 = 30

C = 25 - 8 = 17

2(3a + 5) :

First you have to multiply everything inside the bracket by the number outside the bracket: = 2 x 3a + 2 x 5 or = (2 x 3a) + (2 x 5)

This can then be simplified to give the answe...