Answer:
SA = 253.5 cm
Step-by-step explanation:
SA = 6a^2
SA = 6(6.5)^2
SA = 6(42.25)
SA = 253.50 cm
Adelle steps:




Answer:
See Explanation Below
Step-by-step explanation:
Given

Required
Justify each step
Step 1:

This is the question in its original form
Step 2:

Here she performed addition property of an equation by adding 6 to both sides of step 1.
This is shown below


Step 3:

Here she performed multiplication property of an equation by multiplying both sides of step 2 by 7
This is shown below


Step 4:

Here she also performed multiplication property of an equation by multiplying both sides of step 3 by ¼
This is shown below


I think your answer would be -7.9 hope that helps!