This is the commutative property of addition. It basically says, x+y=y+x.
To answer your question, 103+21=21+103
Answer:
-84%
Step-by-step explanation:
Silvia has to score a 101 to get an average of 90 for all four tests.
Explanation: 90=(86+81+92+x)/4
360=259+x
101=x
2x^2(4x+5) + 5(4x+5)
(2x^2+5(4x+5)
