The axis of symmetry of a parabola like
is a vertical line of the form
where k is the x coordinate of the vertex of the parabola.
In particular, the x coordinate of the vertex of the parabola is given by
which in your case becomes
So, the axis of symmetry is the line
Answer: Expression: 13+x
Answer if she scored 3 in the second half=16
Step-by-step explanation:
Since she scored 13 points in the first half and X amount in the second, it's asking for the total number. Since X is unknown, it's simply 13+x. Then, they say X=3. Now plug 3 in for X and solve.
ie: 13+3
Discount percent = 33%
Sale price = $268
Let the original price be $x.
So,
So, yesterday the price was $400.
You see how these 2 angles marked are both inside the 2 parallel lines?
And they are on opposite side of the transversal, the line crossing the 2 parallel lines?
These 2 angles are alternate interior angles and they are equal, I think you can do the last part by yourself.
Answer:
x = 0
Step-by-step explanation:
The goal is to isolate x. For this equation, you need to distribute the -3 to the terms inside the parentheses first. Then, add both sides by 12. Finally, divide the 24 by -3 in order to finally isolate x.
Thus, x = -8.