Question

question number 9
pls answer

01676fab90d3d9d09b257eecf3fe3c6b.pdf

Answer 1

Answer

28 degrees

Step-by-step explanation:

given AOB is a straight line

so angle of AOB is 180 degrees

===>3x+20+4x-36 =180

===>7x=196

==>x=28

Answer 2

question is

in fig.1 what value of x will make AOB a straight line

solution

AB is a straight line and as we know that the sum of a straight line is 180°

therefore,

180° = (3x + 20) + (4x - 36°)

=> 180° = 3x + 4x + 20° - 36°

=> 180° = 7x + (- 16°)

=> 180° + 16° = 7x

=> 196° = 7x

I

=> x = $\frac{196}{7}$

=> x = $\dfrac{\cancel{196}} {\cancel{7}}$

=> x = 28

Therefore x = 28

The two angles are

(3x +20°) = 3× 28 +20

= 84 + 20

= 104°

And,

(4x - 36°) = 4× 28 - 36

= 112 - 36

= 76°