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otez555 [7]
3 years ago
7

the vertex of this parabola is at (4,-3). When the x-value is 5, the y-value is -6. what is the coefficient of the squared expre

ssion in the parabola's equation

Mathematics
1 answer:
kondaur [170]3 years ago
6 0

Answer:

Step-by-step explanation:

The work form of this upside down parabola is

y=-|a|(x-h)^2+k

It's VERY important that you remember that the negative value there in front of the absolute value of a just means that the parabola is upside down. a itself will not be negative (and we know that because of the absolute value symbols there!). Filling in the x, y, h, and k values we were given allows us to solve for the |a|:

-6=-|a|(5-4)^2-3 and

-6=-|a|(1)^2-3 and

-6=-|a|1-3 and

-6=-|a|(-2) and

3 = -|a|

Again, the negative simply tells us the parabola is upside down, so the absolute value of a = 3, choice c.

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Please help me this is so confusing to me.
Naddik [55]

Hi there! :)

\large\boxed{A = 120^{o}}

Find the central angle using a ratio in regards to angle and circumference.

The radius is 27 units, so use the following equation to calculate circumference:

C = 2rπ

Therefore:

C = 2(27)π = 54π

Since we have the total circumference, we can write the following proportion:

\frac{x}{360} = \frac{18\pi}{54\pi}

Cross multiply:

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Divide both sides by 54π to isolate for x:

x = 120°

8 0
2 years ago
Select 1 answer choices: sizes averages distances areas perimeters
hammer [34]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
If c (x) = StartFraction 5 Over x minus 2 EndFraction and d(x) = x + 3, what is the domain of (cd)(x)?
Volgvan

Answer:

The domain of the function (cd)(x) will be all real values of x except x = 2.

Step-by-step explanation:

The two functions are c(x) = \frac{5}{x - 2} and d(x) = x + 3

So, (cd)(x) = (\frac{5}{x - 2})(x + 3) = \frac{5(x + 3)}{x - 2}

Then, for x = 2 the function (cd)(x) will be undefined as zero in the denominator will make the function (cd)(x) undefined.

Therefore, the domain of the function (cd)(x) will be all real values of x except x = 2. (Answer)

8 0
3 years ago
Read 2 more answers
Point
klemol [59]

Answer:

6.5 bottles

Step-by-step explanation:

convert liters to ml 1 bottle= 1000ml

divide how much she drank by 1000ml

6500÷1000=6.5

4 0
3 years ago
What is the distance between the pair of points (7.2) and (10,6).
Viefleur [7K]

Answer:

(-13,-7)

Step-by-step explanation:

7 0
3 years ago
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