Zach invests ​$20 in the stock market at the beginning of the week. He decides to invest an additional ​$30 at the end of the week. He loses 40​% of his total investment. How much money does Zach ​lose?

$20

Step-by-step explanation:

$20+$30=$50

50×40%= $20

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°