What is the distance between points A(7,3) and B(5,-1)?

Does any one read this story "when mr. came to dine". in 9th grade. plz i need with one question about this story?

In marian anderson sings the author begins the story by putting the reader right in the middle of the action what is the yearn for this type of organization

How does this excerpt develop the central idea that espionage during the civil war was often carried out by untrained citizens? it enhances the reader’s understanding by explaining why training was unnecessary. it changes the reader’s perception of what information a spy was able to obtain. it explains an ordinary person’s motivation for conducting espionage against the enemy. it adds moral complexity to espionage, due to the use of secret and dangerous methods.