I'm guessing it represents the perimeter.
What is the group of numbers?
Answer:
3x-12
Step-by-step explanation:
3(x-4)
Distribute
3x -3*4
3x-12
The formula to convert degrees Fahrenheit to Celsius is:

Convert 59°F to degrees Celsius.
Add the number 59 in the formula, and solve.

Subtract 32 from 59.

Multiply 5 x 9 = 135, then divide 135/9 = 15.

Therefore 59 °F = 15 °C. The correct option is "D".
<h2>{ Pisces04 }</h2>
3)
Now, use Pythagoras theorem to find x

Similarly,
4)
Now, use Pythagoras theorem to find b

You can solve all of them in a similar way.
: )