You would need to change the slope to -6 because perpendicular lines have opposite reciprocal slopes.
Answer:

Step-by-step explanation:

Adding 9x & 3x gives 12x.

Now taking 4 common from both the terms , we get :-

3 Metres; because for each 100 centimetres there is one metre. With centi- being the prefix for 10^-2 in the metric system.
Answer:
doubling the square Apex
Step-by-step explanation: