Christian has a collection of 18 shark teeth. He identified them as 6 tiger shark teeth, 8 sand shark teeth, and the rest as bull shark teeth. What does the ratio 4:18 represent in this situation? Explain your reasoning. Include a model in your explanation. how are part-to-part ratios different from part-to-whole ratios

4:18 demonstrates 'bull shark teeth' to 'total collection'.

Model=

18:18 is ratio of 'collection' to 'collected'.

6:18 is ratio of tiger to collection.

8:18 sand shark teeth to collection

6+8 =14 tiger and sand total

18-14=4 = 4:18 bull shark teeth ratio to collection.

We can also label ratio numbers as 4:18 = b:c

Step-by-step explanation:

answer: a and c are correct

step-by-step explanation:

the +5 is the vertical translation

the added negative symbol in front is the reflection over the y-axis

statement #3: proof- ang is congruent to ang ecd : angles are congruent.  

step-by-step explanation:

1: the missing angles in statement #3  

a.) acb  

reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.  

2: the missing word in reason #3  

c.) vertical  

reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.  

i hope that was and understanding.