4 ounces are left because 3/4 of 20 is 5. And 1/5 of 5 is 4. I hope this helps
Answer:

Step-by-step explanation:
We need at least two points to write the equation of a straight line.
The recursive formula that Elijah wrote is:


When we substitute n=0, we get:



The points (0,30) and (1,37) lies on this line.
The equation of this line is of the form:

where b =30 is the y-intercept and m=7 is the slope.
We plug in these values to get:

Note that the slope of the line is equal to the common difference of the Arithmetic Sequence.
You could also use the two points to find the slope:

Answer:
A squared+B squared=Csquared
Step-by-step explanation:
Use Pythagorean theorem.