exam Maths Puzzle Numerical Ability

HI
please help me with this question

Find an equation of the line that is perpendicular to 2x-3y+6=0 and has the same x intercept as 3x+7y+9=0.

thanks for any help coming this way.

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exam Other Question
How do I find the pattern to the sequence?
1,4,9,1,6,2,5,3,6,4,9,6,4 _,_,_,_
I would also like and explanation how to get the answer so I can explain it to my daughter. Please Help.
Thanks

Find the distance between (4, 0) and (–9, 0).