Answer:
y = 4.8
Step-by-step explanation:
y = k/x
4 = k/6
k = 24
y = 24/5
y = 4.8
Answer:

Step-by-step explanation:
Given
--- Average
--- Average
Required
Determine the overall average
Represent the sum of the first three with x.
So:

Solve for x


Represent the sum of the next seven with y.
So:

Solve for y


The overall average is calculated as thus:




Answer: The correct answer is x=6+y/4