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3 years ago

After I add up all the numbers and divide them what do I do after?

Mathematics

1 answer:

Novosadov [1.4K]3 years ago

4 0

When finding the mean you add up the numbers that are needed to find the mean and divide them by the amount of numbers you added. For example question 5 you will add 58+58+62+55+49+48 which will equal 330 and then divide it by 6 because there are 6 numbers which is 55.

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When 12x² + kx + 3 and 3x³ + (3k + 2)x² + 28x +17

Naily [24]

Answer:

$\boxed{\sf \ \ \ k=5 \ \ \ }$

Step-by-step explanation:

Hello,

We know that for a real, the polynomial P(x) divided by (x-a) the remainder is P(a)

and as

$3x+2=03x=-2x=\dfrac{-2}{3}$

so we need

$12(\dfrac{-2}{3})^2+k(\dfrac{-2}{3})+3=3(\dfrac{-2}{3})^3+(3k+2)(\dfrac{-2}{3})^2+28\dfrac{-2}{3}+17\\ \ multiply \ by \ 9\\ 12*4-6k+27=-8+4(3k+2)-28*2*3+17*9\\ -6k+48+27=-8+12k+8-168+153\\ -6k+75=12k-15\\ 18k=75+15=90\\ k = \dfrac{90}{18}=\dfrac{15}{3}$

hope this helps

7 0

3 years ago

Factor completely x3 + 7x2 − 2x − 14.

Aliun [14]

Answer:

(x + 7) (x^2 - 2)

When you multiply these two factors together, you should get the original polynomial as your answer.

Hope this helps :)

3 0

3 years ago

Read 2 more answers

Find the surface area of prism

SCORPION-xisa [38]

Answer:

hope it helps mark me brill

Step-by-step explanation:

The general formula for the total surface area of a right prism is T. S. A. =ph+2B where p represents the perimeter of the base, h the height of the prism and B the area of the base.

4 0

3 years ago

Its a math test again-

Step2247 [10]

Answer:

A. t > 2.5

Step-by-step explanation:

If she wants to achieve <em>more </em>than 590, we already know the sign would be greater than (>).

All we have to do is divide 590/236, which gives us 2.5.

Therefore, she will have to ride more than 2.5 hours to reach her goal, t > 2.5

Hope this helps :)

Good luck on your test.

3 0

3 years ago

Assume that X is Normal with mean $ 240 and standard deviation $60 . the probability that , in a randomly selected week , Dan wi

enyata [817]

Answer:

The probability of Dan making less than $255 is 0.5987 or 59.87%

Step-by-step explanation:

Given that:

Mean = μ = $240

SD = σ = $60

We have to find the probability that Dan will make less than $255

First of all, we have to find the z-score of 255

z-score is denoted by z and is given by the formula

$z = \frac{x-mean}{SD}$

Here,

x = 255

Putting the values

$z = \frac{255-240}{60}\\z = \frac{15}{60}\\z = 0.25$

Now we have to look at the z-score table to find the probability of 0.25

P(x<255) = 0.5987

Converting into percentage

59.87%

Hence,

The probability of Dan making less than $255 is 0.5987 or 59.87%

3 0

3 years ago