For any number n>1, is п
2 3
+ i
3
4
a. Greater than 1?
b. Less than 1?
C. Equal to 1?

okay so lets make blocks = x and neighborhood = y

2x + y =10

2x + 4y = 31

multiply the top equation by -1 so we can single out y

-2x - y = -10

2x + 4y = 31

combine the two equations  

3y = 21

since the x's have canceled each other out, just divide both sides by 3 to get a single y

y = 7

it takes 7 minutes to go around the neighborhood. knowing that, you can also know it takes a minute and a half to go around the block.

Step-by-step explanation: