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Oduvanchick [21]

3 years ago

13

There are six teachers in a room, ages, 40, 50, 45, 55, and 65. If a 29 year old teacher enters the room, how will the mean age

and standard deviation be affected?

1 answer:

klasskru [66]3 years ago

7 0

The old mean was 51 now the mean is 42.33... (round that to 42) 51 - 42 = 9

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19. (3,5), (2,-2)

Viktor [21]

Answer:

y=7x−16 the answer ;)

8 0

2 years ago

After one day, 1000 copies of a CD are sold. Each of the following days, 100 more copies are sold,

lawyer [7]

Answer:

Equation:

$y - 1000 = 100(x - 1)$

2900 CDs will be sold after 20 days.

Step-by-step explanation:

See image.

6 0

3 years ago

Hey im struggling i need help pleaseee

Ludmilka [50]

Answer:

D

Step-by-step explanation:

The opposite angles of the inscribed quadrilateral are supplementary

∠A + ∠C = 180 and ∠B + ∠D = 180

∠B + ∠D = 93 + x + 30 = x + 123, hence

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8 0

3 years ago

SOLVE. integration of (1-v) /(1+v^2)

Nutka1998 [239]

$\displaystyle\int\frac{1-v}{1+v^2}\,\mathrm dv=\int\frac{\mathrm dv}{1+v^2}-\int\frac v{1+v^2}\,\mathrm dv$

The first integral is already standard and has an antiderivative in terms of $\arctan v$ . For the second integral, take $w=1+v^2$ so that $\dfrac{\mathrm dw}2=v\,\mathrm dv$ . Then

$\displaystyle\int\frac{\mathrm dv}{1+v^2}-\int\frac v{1+v^2}\,\mathrm dv=\arctan v-\frac12\int\frac{\mathrm dw}w$
$=\arctan v-\dfrac12\ln|w|+C$
$=\arctan v-\dfrac12\ln(1+v^2)+C$

4 0

3 years ago

Find the sale price. Original price: $50 Discount: 15%

Brut [27]

100% = 50
10% = 5
5% = 2.5
15% = 7.5
50 - 7.5 = $42.50

3 0

3 years ago