Hmmm lemme do the first one only
Answer:
21°
Step-by-step explanation:
we know that every single triangle has to equal 180°
we have all 3 angles 90° 34° 35° which equal 159°
so we take 180°-159° and your answer is 21°
Ok, so after you do -8a+5a, you also have to do 6 -35, getting the equation
-29-3a
I’m pretty sure it would be C