Question

what is the value of $u$?
$\boldsymbol{50^{circ}}$
$\boldsymbol{u}$
work it out
not feeling ready yet? these can help:
identify complementary, supplementary, vertical, adjacent, and co...
solve one-step
lesson: vertical angles
lesson: adjace
lesson: complementary angles
lesson: supple

Explanation:

Step1: Recognize straight angle sum

A straight angle equals $180^\circ$, so $u + 50^\circ = 180^\circ$.

Step2: Solve for $u$

Rearrange to isolate $u$: $u = 180^\circ - 50^\circ$

Answer:

$130$