Answer:
68.8
Step-by-step explanation:
(a+b)h/2
12.9+8.6 *6.4/2
Answer: Below is the first one
Step-by-step explanation: Second one is right here x=1/5+y/5
The correct answer is A. The total points Shelly earned
Percent decrease=decrease/original times 100
decrease=23.5-21.2=2.3
original=23.5
percent decrease=2.3/23.5 times 100=0.0978 times 100=9.8%
B is answer