All categories

3 years ago

The graph of y= x^2 +4x +3 is shown work out a and b please

Mathematics

2 answers:

sdas [7]3 years ago

3 0

Answer:

A.) i think it's (-2, -1)

B.) ?

Step-by-step explanation:

I am very sorry if they are wrong....i don't know B..sorry

Licemer1 [7]3 years ago

3 0

Answer:

b = (-1,0) (-3,0)

Step-by-step explanation:

You might be interested in

Slope intercept form for (1,3) and (-3,-5)

pav-90 [236]

Answer:

sorry i dont understand you

Step-by-step explanation:

5 0

3 years ago

If a + b = -6 and x + y + z = -2, what is 8a - 7x - 7z - 7y + 8b

Oxana [17]

Answer:

-34

Step-by-step explanation:

a + b = -6

x + y + z = -2

We want 8a so multiply the first equation by 8

8( a + b) = -6*8

8a+8b = -48

We also want -7x so multiply the second equation by -7

-7(x + y + z) = -2*-7

-7x-7y-7z = 14

Add the two equations together

8a+8b = -48

-7x-7y-7z = 14

-------------------------

8a+8b-7x-7y-7z = -34

Rearranging the order

8a - 7x - 7z - 7y + 8b = -34

5 0

3 years ago

HELP! PLZ I NEED THIS ASAP

harina [27]

Answer:

$2x^{4}+x^{3}-x+2$

Step-by-step explanation:

To find which one is prime, let's try to factor them all. We can use the factoring by grouping method.

$x^{3}+3x^{2}-2x-6$

$x^{3}+3x^{2}$ and $-2x-6$

$x^{2}(x+3)$ and $-2(x+3)$

So this one is not prime, since you can still factor it.

$x^{3}+2x^{2}-3x-6$

$x^{3}+2x^{2}$ and $-3x-6$

$x^{2}(x-2)$ and $3(x-2)$

So this one is not prime, since you can still factor it.

$4x^{4}+4x^{2}-2x-2$

$4x^{4}+4x^{2}$ and $-2x-2$

$4x^{3}(x+1)$ and $-2(x+1)$

So this one is not prime, since you can still factor it.

$2x^{4}+x^{3}-x+2$

$2x^{4}+x^{3}$ and $-x+2$

$x^{3}(2x+1)$ and -x+2 cannot be further factored.

Therefore, $2x^{4}+x^{3}-x+2$ is a prime.

6 0

3 years ago

For the data set 6, 5, 10, 11, 13, the mean, 7, is 9. What is the standard deviation?

aleksklad [387]

Answer:

3.39

Step-by-step explanation:

We will use SD formula to find our answer.

= Standard deviation.

= Mean.

N= Numbers of data-points.

We have been given that mean of our data set is 9. So we will find the square of each data point's distance to the mean.

Now let us substitute our given values in above formula.

Upon adding the square of distances we will get,

Upon dividing 46 by 4 we will get,

Upon taking square root of 11.5 we will get,

Therefore, the standard deviation for our given data set will be 3.39.

Read more on Brainly.com - brainly.com/question/11638718#readmore

4 0

3 years ago

WILL GIVE BRAINLIEST 4 3 2x + 4 x+7

Mariulka [41]

Answer:

x = 8

Step-by-step explanation:

$\frac{x+7}{3} =\frac{2x+4}{4}$

do cross multiplication

$3(2x+4) = 4(x+7)\\6x + 12 = 4x + 28\\6x - 4x = 12 - 16\\2x = 16\\x = 16/2\\x = 8$

3 0

3 years ago