1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alborosie
2 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]2 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

You might be interested in
|4x+8|&gt; 2<br> what is the answer
Nookie1986 [14]

Step-by-step explanation:

|4x + 8| > 2

Therefore 4x + 8 > 2 or 4x + 8 < -2.

When 4x + 8 > 2, 4x > -6, x > -1.5.

When 4x + 8 < -2, 4x < -10, x < -2.5.

Hence, x < -2.5 or x > -1.5.

5 0
3 years ago
Read 2 more answers
PLEASE HELP WITH GRAPHING QUESTION ASAP!!
bulgar [2K]

x-int: -0.5; y-int: 1

7 0
3 years ago
Read 2 more answers
What percent of 17 is 51?
Taya2010 [7]

Answer:

33%

Step-by-step explanation:

h steps:

Step 1: We make the assumption that 51 is 100% since it is our output value.

Step 2: We next represent the value we seek with $x$.

Step 3: From step 1, it follows that $100\%=51$.

Step 4: In the same vein, $x\%=17$.

Step 5: This gives us a pair of simple equations:

$100\%=51(1)$.

$x\%=17(2)$.

Step 6: By simply dividing equation 1 by equation 2 and taking note of the fact that both the LHS

(left hand side) of both equations have the same unit (%); we have

$\frac{100\%}{x\%}=\frac{51}{17}$

Step 7: Taking the inverse (or reciprocal) of both sides yields

$\frac{x\%}{100\%}=\frac{17}{51}$

$\Rightarrow x=33.33\%$

Therefore, $17$ is $33.33\%$ of $51$.

4 0
2 years ago
Read 2 more answers
Please help with this
Setler [38]

Answer:

x = 6

Step-by-step explanation:

The scale factor is

28/8 = 7/2

We take the ratio of the larger side over the smaller side

Using ratios we can find the sides

28         21

----- = ---------

8           x

Using cross products

28x = 21*8

28x =168

Divide each side by 28

28x/28 = 168/28

x =6

7 0
3 years ago
Cody's rent is increasing by $51 per month starting next year. That is an increase of 15% from his current monthly rent. Let r r
Inessa05 [86]

Answer:

r = 43.35

Step-by-step explanation:

Given

Current\ Rent = r

Increment = 15\%

New\ Rent = \$51

Required

Determine the value of r

The value of r can be set up percentage increase formula as follows:

\%Increment  = \frac{New\ Rent - Current\ Rent}{Current\ Rent}

Substitute values in the above equation

15\% = \frac{51 - r}{51}

Cross Multiply

51 - r = 15\% * 51

Convert percentage to decimal

51 - r = 0.15 * 51

51 - r = 7.65

And the value of r\ is\ calculated\ using:

r = 51 -7.65

r = 43.35

Hence, Cody's current rent is $43.35 monthly

8 0
3 years ago
Other questions:
  • What are the minimum, first quartile, median, third quartile, and maximum of the data set?
    7·2 answers
  • Maggie's brother is 10 years younger than twice her age. The sum of their ages is 29. How old is Maggie? Maggie is ___years old.
    11·1 answer
  • Really need help and giving brainlest
    8·1 answer
  • What is the value of x in the equation 1/5x-2/3y=30 when y=15
    7·2 answers
  • Inequalities part 2<br> I need help pls i dont understand
    7·1 answer
  • The number of students at a school decreased 20% from 2010 to 2011. If the number of
    8·1 answer
  • Word form for 0.003?
    5·2 answers
  • What is the equation for g(x)?
    9·1 answer
  • Y-5=0.5x^2+6x-3 how many x-intercepts does the graph of this quadratic have ?
    6·1 answer
  • Find possible zeroes<br> f(x)=3x^6+4x^3-2x^2+4
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!