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3 years ago

This might be a waste of time but. 1-6 :)

Mathematics

1 answer:

olasank [31]3 years ago

4 0

Answer:

1. 6 yd

2. 32 oz

3. 8 fl oz

4. 10560 ft

5. 2.5 ton

Step-by-step explanation:

I can't see the rest of 6

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Simplify $(1-3i)(1-i)(1+i)(1+3i)$

PSYCHO15rus [73]

$(1-3i)(1-i)(1+i)(1+3i)=\\(1^2-(3i)^2)(1^2-i^2)=\\(1+9)(1+1)=\\10\cdot2=20$

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4 years ago

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F(x) = x-5, g(x) =x^2 - 1 find (f+g)

DaniilM [7]

F(x)=x-5
g(x)=x^2
Now adding f(x) and g(x)
x-5+x^2-1
x^2+x-6
x^2+(3-2)x-6
x^2+3x-2x-6
x(x+3)-2(x+3)
(x-2)(x+3) answer

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3 years ago

Barbara has 9 stuffed animals Trish has three times as many stuffed animals as Barbara how many stuffed animals does Trish have

Rainbow [258]

9 x 3 = 27
27 is the answer

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3 years ago

A sphere with a mass of 12g has a radius measuring 2 cm. what is it’s density?

Aleks04 [339]

Answer:

Step-by-step explanation:

A. 0.36 g/cm³

Explanation:

Density = mass/volume

We know the mass, but we must calculate the volume.

The formula for the <em>volume of a sphere</em> is

V = ⁴/₃πr³

r = 2 cm

V = ⁴/₃π × 2³

V = (4π×8)/3

V = (32π)/3

V = 33.5 cm³

=====

Calculate the <em>density </em>

Density = 12/33.5

Density = 0.36 g/cm³

The density of the sphere is 0.36 g/cm³.

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3 years ago

. Use the statistical features of your calculator to find the mean and the standard deviation to the nearest tenth of a data set

uysha [10]

Answer:

Mean = 1.9

Standard deviation = 0.6

Step-by-step explanation:

The Mean is calculate by the formula:

$Mean = \frac{\text{Sum of all the observation}}{\text{Total number of observation}}$

⇒ $Mean = \frac{24.9+24.7+24.7+23.4+27.9}{5} = 1.85$

Thus Mean to the nearest tenth is 1.9

Standard Deviation is the square root of sum of square of the distance of observation from the mean.

$Standard deviation(\sigma) = \sqrt{\frac{1}{n}\sum_{i=1}^{n}{(x_{i}-\bar{x})^{2}} }$

where, $\bar{x}$ is mean of the distribution.

Putting all values in the formula, We get

Standard Deviation = 0.597 ≈ 0.6

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3 years ago