Use a two-column proof to prove the following:

Given: In the image above line L⊥k.

Prove: ∠1 and ∠2 are complementary.

Which expression gives the area of the triangle shown below

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Abari owns 100 shares of stock a and 45 shares of stock b. for the past month, his stocks have been fluctuating inversely. stock a decreased by m cents per share and stock b increased by n cents per share. which equation can be used to find the total change in value of jabari's shares per month?