Question

please answer this question if you know the answer then only answer else reported please show all the workings​

Answer 1

Answer:

1. Yes they are

2. a.  7.5

    b. 120

Step-by-step explanation:

1. To check whether the 2 variables are inversely proportional:

x     9        12        2

y     4         3         18

multiply x and y, if xy of row 1 = xy of second row, then the 2 variables are inversely proportional.

xy = 9*4 = 36 12*3 = 2*18

Hence proved

2. It is given, the 2 variables are Directly proportional. Thus,

use cross multiplication.

a = 3*90/36 = 7.5

b = 36*10/3 = 120

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