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Question

If a point (4,34)lies on the line 5x+by=7, then the value of b is

A
-20
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B
-25
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C
-36
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D
40
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Solution

The correct option is C -36
Given that (4,34) lies on 5x+by=7. Substituting x = –4 and y=34 in 5x+by=7, we get
5(4)+b(34)=7
34b=7+20=27
b=27×(43)=36
Hence, the correct answer is option (c).

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