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Kitty [74]
3 years ago
15

The value of k 4x^2 +20k+k

Mathematics
1 answer:
Wittaler [7]3 years ago
8 0

Step-by-step explanation:

You want the to find the value of k such that the y coordinate of the vertex is 0.

0=x2−6x+k

The x coordinate, h, of the vertex is found, using the following equation:

h=−b2a

h=−−62(1)=3

Evaluate at x = 3:

0=32−6(3)+k

k=9

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Which function has a minimum of -4?
icang [17]
I think it is c but I’m not sure
7 0
1 year ago
What is the highest common factor of 27 and 36?
snow_lady [41]
Hello there!

The highest common factor, also known as the greatest common factor, or GCF, is the biggest factor that both numbers have in common.

Let's factor out our numbers.

27;
1 x 27
3 x 9

36;
1 x 36
3 x 12
4 x 9
6 x 6

Both of these numbers have these in common:
1, 3, 9.

Since 9 is the highest number in common, it is our GCF or highest common factor.

I hope this helps!
3 0
4 years ago
HI I need help please <br> Its in the pictures
Brut [27]
1.

r=32\,\text{units}\\\\&#10;A=\pi\cdot r^2=\pi\cdot32^2=1024\pi\,\,\text{units}^2

Answer D.

2.
From secant theorem, we know, that:

|AE|\cdot|BE|=|DE|\cdot|CE|

and from picture:

|BE|=x+1\\\\|CE|=x+4\\\\|AE|=11+x+1=x+12\\\\|DE|=1+x+4=x+5

So we can calculate:

|AE|\cdot|BE|=|DE|\cdot|CE|\\\\(x+12)\cdot(x+1)=(x+5)\cdot(x+4)\\\\&#10;x^2+12x+x+12=x^2+5x+4x+20\\\\&#10;x^2+13x+12=x^2+9x+20\quad|-x^2\\\\13x+12=9x+20\quad|-9x\\\\4x+12=20\quad|-12\\\\4x=8\quad|:4\\\\\boxed{x=2}
8 0
3 years ago
If f(x) varies directly with x and f(x) = 40 when x = 8, find the value of f(x) when x = 2.
Vsevolod [243]

Answer:

f(x) = 10

Step-by-step explanation:

for direct variation

f(x) = kx

substitute in for f(x) and x

40 = k*8

solve for k

40/8 = k*8/8

5 =k

now we have

f(x) = 5*x

let x=2

f(x) = 5*2

f(x) = 10


4 0
4 years ago
Read 2 more answers
0.91÷81.75 can someone help please
grin007 [14]
89.8351648352 is your answer<span>
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6 0
3 years ago
Read 2 more answers
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