Question 10

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waecmaths question: 

What is the value of m in the diagram?

Option A: 

20o

Option B: 

30o

Option C: 

40o

Option D: 

50o

waecmaths solution: 

$\begin{align}  & 4m-{{15}^{\circ }}=m+{{75}^{\circ }} \\ & 4m-m={{75}^{\circ }}+{{15}^{\circ }} \\ & 3m={{90}^{\circ }} \\ & m={{30}^{\circ }} \\\end{align}$

maths year: