a 30-foot ladder is placed against a vertical wall so that the base of the ladder is 10 feet from the base of the wall. how far up the wall does the ladder reach?

Which of these is and example of a literal equation? a) 6+30=6^2 b)3x-4y c)12=9+3x d)ax-by=k

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.

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?