Clara simplifies {8b-4r}- {2b-r} and says the result is 6b-5r. what error did clara make?

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

If rt is greater than ba, which statement must be true ?

What is the absolute value of -100000000000000?