(4-x) /(3x+21)
The denominator cannot be zero
3x + 21 ≠ 0
3x ≠ -21
x ≠ -7
The domain of the function will be all real number except -7
{x | x ≠ -7}
The given equation y=a
represents a degree 2 equation .The equation drawn on a graph represents a parabola.The value of a decides if the parabola will open up or down.It can be negative or a positive number but not 0.
If a=0 then equation will represent a straight line .
If a is negative parabola opens down.If a is positive parabola open up.
The value of a is only negative is False.
Answer:I forgot how to do that one but I had it
Step-by-step explanation:I’m sorry
Slope-intercept form gives is

where

is the slope of the line and

is the y-intercept.
You can see that in slope-intercept form the

term is alone. In order to convert

into slope intercept form, you must isolate the y term.
First we'll subtract 9x from each side.

Now we can divide both sides by -7.

Now we can simplify it.