Answer:
B. 
Step-by-step explanation:
Find the missing length by subtracting 5^2-3^2 to get 4^2.
Then do 4^2+7^2 to get 65
Answer: x^2 + 40x
Nothing can further be done with the topic.....
Y=(1/5)^x would be the only equation demonstrating decay of these
I think it’s y=-1x+ -8 or could be written as y=-1x-8
Because all three angles add up to 180 (a line) it would be 65+65, or 130 degrees. Then subtract 130 from 180. your missing angle is 50 degrees