The diagram shows a pattern using four identical rhombuses. Diagram NOT
accurately drawn
25
25
25
Work out the size of the angle marked a.
You must show your working,

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.

Simplify. 4+3/7x-2-2/7x a. 2-5/7x b. 6-1/7x c. 2+1/7x d. 6+5/7x

Ron has 8 caps and 4 of his caps are blue. thes rest of his cap are red. how many of ron's caps are red