Answer:
Step-by-step explanation:
When comparing to standard form of a parabola: 
Vertex form of a parabola is: 
, which is what we are trying to convert this quadratic equation into.
To do so, we can start by finding "h" in the original vertex form of a parabola. This can be found by using: 
.
Substitute in -8 for b and 2 for a.
Simplify this fraction.
The "h" value is 2. Now we can find the "k" value by substituting in 2 for x into the given quadratic equation.
Simplify.
We have the values of h and k for the original vertex form, so now we can plug these into the original vertex form. We already know a from the beginning (it is 2).
-3x=15
Divide both sides by -3 to get + x
-3x/-3= 15/-3
Cross out -3 and -3 , divide by -3 and then becomes 1*1*x= x
x=-5
Answer: x= -5
Answer:
It is not proportional
Step-by-step explanation:
To figure out if something is proportional they have to equal the same thing.
As you can see on the problem 0.2 and 0.2 are the same thing, and since one is on the numerator and one is on the demoninator those two can cross out.
Now we come to the 0.08 and the 0.8.
They are not the same thing the 0.08 has an extra 0.
So this is not proportional
<em>-I hope this helps! -Karen</em>
Answer:
Step-by-step explanation:
5 + 5
- 2x = 3 - 4
use your algebra skillz :P to move terms back and forth across the equal sign
5 - 3 - 2x + 5 +4 = 0
2 -2x +9 = 0
