Anyone could help a little?

9514 1404 393

  a) 100

  b) 15 miles

Step-by-step explanation:

Each small square on the graph represents 1 person.

a) To the right of distance = 30 miles, there are 4 groups of 25 small squares, so 100 people travel 30+ miles.

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b) To the right of distance = 15, there are (11 +6×5)×5 = 205 small squares. That is 205 people travel more than 15 miles to work. Sam may travel about 15 miles to work.

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4