Answer:
9 is an rational number because it is a whole number
Step-by-step explanation:
Yo answer to yo question is d
In order for two linear lines to be perpendicular, the product of their gradient must be -1.
Let's take y = x + b and y = -x + b
This is already in the form: y = mx + b, where m is 1 and -1 respectively.
Since the product of their gradient is -1, they are said to be perpendicular.
Answer:
Step-by-step explanation:
Formula used =
The answer is D because you can multiply the second equation by -4