3 years ago

How do you find standard deviation?

1 answer:

3 0

You first work out the mean then for each number subtract the mean and square the result then work out the mean of those squared differences and take the square rot of that and you're done :)

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Given the vectors w = <-5, 3> and z = <1, 4>, find the results of the vector subtractions. -w − z = z − w = w − z =

liq [111]

Answer:

-w − z = <4, -7>

z − w = <6, 1>

w − z = <-6, -1>

Step-by-step explanation:

6 0

2 years ago

Which numbers should be multiplied to obtain 175^2 − 124^22?

agasfer [191]

This question seems to me to be an exercise in applying the rule for a difference of squares in order to rewrite the difference of two relatively large numbers as the "simpler" product of other integers.

$175^2-124^2=(175-124)(175+124)=51\cdot299=15,249$

3 0

2 years ago

How Do I solve this I am quite confused

Kazeer [188]

Answer:

$11,714

Step-by-step explanation:

C(x) = 0.7x² - 462x + 87,944

this is a quadratic equation that opens up

the vertex will be the minimum

From the quadratic formula the x coordinate of the vertex is

x = -b/2a

x = 462/(2 * 0.7)

x = 330

Plug in

c(330) = 0.7(330²) - 462(330) + 87,944

c(330) = 11,714

$11,714

5 0

3 years ago

Please need help with one

elixir [45]

The answer is 88 cube units.

3 0

2 years ago

The length of a rectangle is three more than twice the width. Express the length of the rectangle in terms of its width W.

Alika [10]

Answer:

L = 3W + 3.

Step-by-step explanation:

Twice the width = 2W,

Adding 3 gives 2W + 3.

8 0

3 years ago