Answer:
D or A
Step-by-step explanation:
(D) One circle : four triangles
Example:
One triangle is 1/4 of a circle
(A) One circle : four triangles
Example:
If there is two circles, the triangles will double like it shows [evidences]
Answer:
Constant of proportionality: 
Equation: 
Step-by-step explanation:
By definition, Direct proportion equations have the following form:

Where "k" is the Constant of proportionality.
In this case, let be "c" the the amount of caffeine consumed (in mg) from a glass of Diet Pepsi and "d" the number of ounces that was drank.
So, the equation that represents this relationship will have this form:

Then, the first step is to find the Constant of proportionality "k".
Knowing that:

We can substitute values into the equation:

Now, solving for "k", we get:

Therefore, we can write the following equation that represents that proportional relationship:

Answer:
x = 4
x = -1
Step-by-step explanation:
I don’t know but i need points