may someone help me with this?? QUESTION: Write the phrase as an expression 5 times a number d An expression is. i put already d-15 but it was wrong so yes i need help

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

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.

Aright triangle has an area of 21 m2. the dimensions of the triangle are increased by a scale factor of 4. what is the area of the new triangle