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Answer: 
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Given: 
Find: 
Solution: In order to solve for x we need to isolate it with the first step being to subtract 1 from both sides and then we would divide both sides by 3 to give us the solution.
<u>Subtract 1 from both sides</u>
<u>Divide both sides by 3</u>
Therefore, the final answer would be that x is equal to -1/3.
Step-by-step explanation:

therefore, 9 students haven't given their speech
Answer:
y = -1/4(x +4)² +4
Step-by-step explanation:
The equation of a parabola with focus (a, b) and directrix y=d can be written using the form ...
y = 1/(2(b-d))(x -a)² +(b+d)/2
<h3>Application</h3>
We are given (a, b) = (-4, 3) and d=5. Using these values in the above form gives the equation ...
y = 1/(2(3-5))(x -(-4))² +(3+5)/2
y = -1/4(x +4)² +4