The mat adds 3 inches to each side, so the length would be 3+20 = 23 inches. The width would become 3 + 9 = 12 inches.Area = Length x width:
23 x 12 = 276 square inches
Answer:




Step-by-step explanation:
Given:



Solving (a): The value of y
From the given parameters, we understand that

Substitute values for RS, ST and RT

Collect Like Terms


Divide both sides by 2


Solving (b):
<em>The value of RS</em>
Substitute 6 for y in 



<em>The value of ST</em>
Substitute 6 for y in 



<em>The value of ST</em>
Substitute 6 for y in 



Answer:
X = X
Step-by-step explanation: