exam Maths Puzzle Numerical Ability

Please Help I am not sure how to do this problem

L has y-intercept (0, _3) and is parallel to the line with equation y= -2/3+1

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exam Other Question

There are 2 brothers among a group of 20 persons.In how many ways can the group be arranged around a circle so that there is exactly one person between two brothers? Please help me with the following problems. Thank you very much!!!
1)state the domain and range of y=708/(x+3647)^2
2)verify that f and g are inverses of each other:
f(x)= (8x/