Combine like terms
20=2x+4
Subtract 4 from both sides
16=2x
Divide both sides by 2
8=x
Final answer: x=8
Answer:
option (a) is the answer in think
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Answer:
focus: (0, -5.5)
directrix: y = 5.5
Step-by-step explanation:
The equation compares to the form ...
x² = 4py
where 4p = -22 ⇒ p = -22/4 = -5.5.
The value of p is the distance from the vertex to the focus. The negative value means the focus is below the vertex at (0, -5.5).
The directrix is above the vertex by the same amount, so is y = 5.5.