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gavmur [86]
3 years ago
6

Pls answer asap i need this answer quick plus the full explanation #8

Mathematics
1 answer:
vlada-n [284]3 years ago
5 0
Please answer please please thank you
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PLEASE HELP
ale4655 [162]

y =  - 3x^{2}  + 18x + 10 \\  \frac{d}{dx}( - 3x^{2}  + 18x + 10) \\  - 6x + 18 = 0 \\  - 6x =  - 18 \\ x = 3

The axis of symmetry for parabola is x = 3.

Using derivative to solve for axis od symmetry is easier.

7 0
3 years ago
The functions f(x) = -(x+4) +2 and g(x) =(x-2)^2 -2 have been rewritten using the completing the square method. Apply your knowl
rewona [7]

Answer:

g(x) = (x-2)^2 -2

If we compare this function with the vertex form we see that:

a = 1, h =2, k =-2

So then the vertex would be (h,k)=(2,-2)

And since the value for a is positive we know that the parabola open upward. We don't have a maximum defined since open upwards and the minimum point correspond to the vertex on this case (2,-2).

f(x)= -(x+4)^2 +2

If we compare this function with the vertex form we see that:

a=-1, h =-4, k = 2

And since the value for a is negative we know that the parabola open downward. We don't have a minimum defined since open downwards and the maximum point correspond to the vertex on this case (-4,2).

Step-by-step explanation:

We need to remember that the standard form for a parabola is given by the following equation:

y = ax^2 + bx +c

And the vertex form is given by this formula:

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

And we want to find the vertex and if we have a maximum or minimum for each function. Let's begin with g(x)

g(x) = (x-2)^2 -2

If we compare this function with the vertex form we see that:

a = 1, h =2, k =-2

So then the vertex would be (h,k)=(2,-2)

And since the value for a is positive we know that the parabola open upward. We don't have a maximum defined since open upwards and the minimum point correspond to the vertex on this case (2,-2).

For the function f(x) we assume that we have the following equation:

f(x)= -(x+4)^2 +2

If we compare this function with the vertex form we see that:

a=-1, h =-4, k = 2

And since the value for a is negative we know that the parabola open downward. We don't have a minimum defined since open downwards and the maximum point correspond to the vertex on this case (-4,2).

4 0
3 years ago
Please help me as soon as possible
muminat

Answer:

B

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The earth has an average diameter of 12.800km. If you walked 24 hours a day, 5 days a week (and if you could walk on water)at a
Dimas [21]
1) Circumference of Earth: Diameter x π → 12,800 x π = 40,212.39 km 

2) time in Hour = distance/speed → distance = 40,212.39 and speed = 2 Mi/h 

1st: convert miles into km : 1 mile = 1.609344 km and 2 miles = 3.218688 km
2nd: convert speed into km/h → speed = 3.218688 km/h
And time in hour = 40,212.39 / 3.218688 → time = 12,493 hours  OR in days:
12,493 / 24 = 521 days (OR 104 weeks, including 2 days of rest)

4 0
3 years ago
What Value of m will make this equation true? 3 (m - 5) + 8 = 7 - 1/2 (4m - 11)​
KatRina [158]

Answer:

m = 7.1

Step-by-step explanation:

3 (m -5) + 8 = 7 -1/2 (4m - 11)

So, what I did first was distribute the values in the parenthesis to get,

3m - 15 + 8 = 7 -2m -5.5

Now that we have the parenthesis taken care of we can do the simpler math,

3m - 23 = 7 -2m - 5.5

I just added the 15 and 8, so now I move the -5.5 to the opposite side by adding.

3m - 23 = 7 -2m -5.5

<u>        +5.5             +5.5</u>

3m - 28.5 = 7 - 2m

Here we can do the same with the -2m.

3m - 28.5 = 7 - 2m

<u>+2m                 +2m</u>

5m - 28.5 = 7

To get rid of the -28.5 I added it to the 7 getting an answer of,

5m - 28.5 = 7

<u>      + 28.5    +28.5</u>

5m = 35.5

Finally, divide 5m and 35.5 both by 5.

5m/5 = m

35.5/5 = 7.1

Answer: m=7.1

Sorry it's really long, but I hope this helps! Have a great day!

6 0
3 years ago
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