kalizeller kalizeller

07-03-2018
Mathematics

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choixongdong choixongdong

07-03-2018

4x+30=90
4x = 60
x = 15

answer is B. 15

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Bladerunner1976 Bladerunner1976

07-03-2018

Since b and d are perpendicular the angles they form are 90 degree angles. Also given that a and b are parallel the angles between a and d are the same as those with b and d.

SO we can say that 4x + 30 = 90
4x = 60
x = 15

Answer Link

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