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Alborosie
3 years ago
5

If the quadratic function y=8x−4x2+5y=8x−4x2+5 is to be transformed in its vertex form, what number should be placed in the box?

Mathematics
1 answer:
NeX [460]3 years ago
3 0

Answer:

I can not see the image to see where is the box, so i will answer this in a more general way.

For a general quadratic equation:

y = f(x) = a*x^2 + b*x + c

The vertex form si:

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

Where (h, k) is the vertex of our quadratic function.

such that h = -b/2*a

and k = f(h)

Then the first step here is to find the vertex of our quadratic function.

Our quadratic function is:

y = 8*x - 4*x^2 + 5

Let's rewrite this as:

y = f(x) =  -4*x^2 + 8*x + 5

then we have:

a = -4

b = 8

c = 5

Then here we have:

h = -b/(2*a) = -8/(2*-4) = -8/-8 = 1

h = 1

now to find the value of k we use:

k = f(1) = -4*1^2 + 8*1 + 5  = 9

Then we have:

h = 1

k = 9.

Then the vertex form of our function is:

y = -4*(x - 1)^2 + 9

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In the problem 8^3 - 10 × 5 - 4, which step should you perform first?
Doss [256]

Answer:

PEMDAS

Step-by-step explanation:

P=Parenthesis

E=Exponent

M=Multiply

D=Division

A=Addition

S=Subtract

7 0
3 years ago
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The table represents the observed number of leaves y on x branches of a tree. Calculate the rate of change between 3 and 4 branc
Dennis_Churaev [7]

Answer:

<h2>25</h2>

Step-by-step explanation:

The rate of change of number of tree y on x branches of a tree is expressed as shown;

m = Δy/Δx where;

m is the rate of change

Δy is the change in number of leaves  between 3 and 4

Δx is change in number of branches  between 3 and 4

m = Δy/Δx = y₂-y₁/x₂-x₁

From table between 3 and 4, y₂ = 100, y₁ = 75, x₂ = 4, x₁ = 3

m = 100-75/4-3

m = 25/1

m = 25

<em>Hence the rate of change between 3 and 4 branches is 25</em>

5 0
3 years ago
Reduce the fraction:<br> 7b-14b²/42b²21b
ch4aika [34]

Answer:

(1-2b)/126b^2

Step-by-step explanation:

(7b-14b^2)/(42b^2*21b)

factor out the 7b,

[7b(1-2b)]/882b^3

[7b(1-2b)]/[7b(126b^2)]

cancel out the 7b's

(1-2b)/126b^2

7 0
3 years ago
The sum of the ages of Levi and Monique is 76 years. 8 years ago, Levi's age was 3 times Monique's age. How old is Levi now?
andreev551 [17]

Answer:

Levi is 53 yrs now

Step-by-step explanation:

sum = 76yrs

Levi = 3x -8

Monique = x - 8

8yrs ago

sum= 76 - 8 - 8( the two 8s are from each of the two brothers).

      = 60yrs

Levi=3x

Monique=x

3x + x = 60

4x = 60

x = 15yrs

Levi = 3x

               = 15 x 3

               = 45 yrs(8yrs ago)

now = 45 + 8

       = 53yrs now

Monique = x

               = 15

now = 15 + 8

           23yrs now

8 0
2 years ago
Parallelogram or not ?
Zielflug [23.3K]

Answer:

I think so

Step-by-step explanation:

here's here's the definition of a parallelogram

"a four-sided plane rectilinear figure with opposite sides parallel."

3 0
3 years ago
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