Find the missing value.
-4 = ___ -9

What signals you that factoring by grouping is the best method to use when factoring a problem?

Determine the relationship of ab and cd given the following points

In the diagram, a building cast a 35-ft shadow and a flagpole casts an 8-ft shadow. if the the flagpole is 18 ft tall, how tall is the building? round the the nearest tenth.