In order to make a fraction a ratio, you must simplify it if it is needed. So for 12/9, you can divide 3 from the numerator and denominator. That would equal 4/3. Now that it is simplified, you can make it into a ratio. (can be using ":" or using the word "to")
One way it can be used is --> 4:3
Another way --> 4 to 3
Good luck!
The answer is B all angles are right angles.
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I do not think that it is possible to visit every cell without revisiting any to go from one corner to the opposite one.
Not sure if the equation is

or








On the other side of the equation, we'd get

Then

- If it's the second one instead, you can use the same strategy as above:


(Note that this step assume
)



Then we get

Answer: 15
Step-by-step explanation: anything in those two straight lines is automatically positive