exam Maths Puzzle Numerical Ability

A line parallel to 3x-9y=4 and sketch the graph

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exam Other Question

5x/7-2x/5=6/35 these are fractions...numerators are 5x, 2x, & 6
denominators are 7, 5, & 35
Would someone please help me with this problem...
Given f(x)=x^2+3 and g(x)(sqrt)2-x find f o g(x).

a.5-x
b.1-x
c (sqrt)5-x^2
d. 7+x^2


Thanks