Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


We can make groups of two to make this EQ. shorter 

1-2=-1      3-4=-1    ............   79-80=-1 

therefore answer should be -40 because we made 40 pairs as such

ANS=>    -40
hope this will help you 
Vishwas Choudhary

0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts