Becky has borrowed money from two friends and she wants to pay off her debts. Her debt to one friend is represented by the number -14.55. Her debt to her other friend is represented by the number -8.79. What number represents her total debt?. 1. 23.34
2. -23.34
3. -5.76
4. 5.76

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.