Use the general definition:
|x - a| ≤ k => - k ≤ x - a ≤ k
So, |a - 9| ≤ 4 => - 4 ≤ a - 9 ≤ 4
Which is a - 9 ≥ - 4 and a - 9 ≤ 4.
That is the second option.
Answer: a - 9 ≤ 4 and a - 9 ≥ - 4
Step-by-step explanation:
The standard form for a line is Ax+By=C
First, we need to find the slope, or change in y over change in x. For the first one, this is
, which is impossible to find as we cannot divide by 0, meaning that this is constant horizontally -- in this case, x=2. Thus, we have 1*x+0*y=2.
For the second one, we can find the slope by getting
. We can then take the point (3,0) (it can be any point on the line) and get our equation to be y-0 = (-2/3) (x-3). Converting this to standard form, we can expand this to get
y= (-2/3)*x +2
(-2/3)*x+1*y = 2
The correct answer is letter B
Answer:
3
Step-by-step explanation: