1 Answer

JoeyC · Answer 1 · 2020-08-26T08:06:11+0000

Answer:

E. 22

Explanation:

Look at the picture.

The lines l and m are parallel, therefore alternate interior angles are congruent.

Therefore
$\beta=50^o$

Supplementary angles add up to 180°.

Therefore

$(5x-16)+\theta=180$ add 16 to both sides

$5x+\theta=196$ subtract 5x from both sides

$\theta=196-5x$

We know: the sum of the triangle angle measures is 180°.

Therefore we have the equation:

$50+2x+196-5x=180\\\\-3x+246=180\qquad\text{subtract 246 from both sides}\\\\-3x=-66\qquad\text{divide both sides by (-3)}\\\\x=22$