Becouse k and n are 'neighbours' so their sum are 180
so k=180-42=138
Answer:
9 squares on each side of the square.
Step-by-step explanation:

There are 9 equally sized blocks on one side of square piece of graph paper.
Best Regards!
Answer:
270
Step-by-step explanation:
307-31=276 so the estimate would be 270
Answer:
<6 OR b>-3
Step-by-step explanation:
hope this helps