darkes
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#1
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#1
The straight line l passes through (7a, 5) and (3a, 3).
An equation of l is x+by-12=0.
Find the value of a and the value ob.

Would really appreciate any help on this!!
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Arctic Kitten
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#2
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#2
substitute the points in:
(7a,5): 7a+5b-12=0
(3a,3): 3a+3b-12=0
and solve
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roborto1999
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#3
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#3
(Original post by darkes)
The straight line l passes through (7a, 5) and (3a, 3).
An equation of l is x+by-12=0.
Find the value of a and the value ob.

Would really appreciate any help on this!!
substitute the coordinates into the equation. this will give you two simultaneous equations, solve from there.
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jedijessop
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how does this help we are left with xa nb = 0 still two unknowns????
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davros
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#5
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(Original post by jedijessop)
how does this help we are left with xa nb = 0 still two unknowns????
You shouldn't really bump 2 year old threads, but if you follow the steps in Post #2 you can solve the simultaneous equations and find a and b as required.
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