7 because 7*7*7 equals 343
Answer:


Step-by-step explanation:
Given



Required
The size of
of height 
First, we calculate the width using the following equivalent ratios

Express as fraction

Solve for x


Hence:
--- approximated
So, we have:


The size (diagonal) is then calculated using:




--- approximated
Answer:
(X, y) =(3,-3)
Step-by-step explanation:
Use second equation
Apply to the first