Step-by-step explanation:
ED = EB
2x +3 = 5x -15
3+15=5x -2x
18 = 3x
18 ÷ 3 = x
x = 6
Answer:
128
Step-by-step explanation:
86 plus 87 plus 91 =264
You have to get 98 times 4 which is 392
Then;
392-264, which is 128, which is the answer (the fourth number)
So;
86+87+91+128 = 392 divided by 4 (the number of numbers there is) which equals 98!
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Answer:

Step-by-step explanation:
We need to find the equation of parabola using given information
- Vertex: (0,0)
- Open to the left
- Focal width = 12
If parabola open left and passes through origin then equation is

Focal width = 12
Focal width passes through focus and focus is mid point of focal width.
Focus of above parabola would be (-a,0)
Passing point on parabola (-a,6) and (-a,-6)
Now we put passing point into equation and solve for a


a can't be negative.
Therefore, a=3
Focus: (-3,0)
Equation of parabola:

Please see the attachment of parabola.
