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3 years ago

–8x – 8y = 0 –8x + 2y = –20

Mathematics

2 answers:

beks73 [17]3 years ago

8 0

-8x/-8 - 8y/-8=0
x-8y/-8=0
x+y=0

the answer is x+y=0

Alona [7]3 years ago

7 0

The answeer is negative 2 you combine like term and x canclles out and you are left y and then you bring down y and negative 20 and then you divid y and you get negative 2

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85% of 920 and I would like to know how to do it.

Darya [45]

85% of 920
85% * 920
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*Hope that helps :)*

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3 years ago

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3 years ago

Charlie reads quickly. He reads 1\dfrac371 7 3 1, start fraction, 3, divided by, 7, end fraction pages every \dfrac23 3 2 st

OLEGan [10]

<h2>Answer:</h2>

The number of pages he will read in one minute is:

$2\dfrac{1}{7}\ \text{pages}$

<h2>Step-by-step explanation:</h2>

It is given that:

Charlie reads $1\dfrac{3}{7}\ \text{pages}$ in every $\dfrac{2}{3}\ \text{minutes}$ .

We know that:

$1\dfrac{3}{7}=\dfrac{10}{7}$

This means that:

Charlie reads $\dfrac{10}{7}\ \text{pages}$ in every $\dfrac{2}{3}\ \text{minutes}$ .

This means that:

$\text{In}\ \dfrac{2}{3}\ \text{minutes he reads}\ \dfrac{10}{7}\ \text{pages}\\\\\text{Hence}$

$\text{In}\ 1\ \text{minute he will read}\ \dfrac{\dfrac{10}{7}}{\dfrac{2}{3}}\ \text{pages}$

$\text{In}\ 1\ \text{minute he will read}\ \dfrac{10\times 3}{7\times 2}\ \text{pages}$

Hence,

$\text{In}\ 1\ \text{minute he will read}\ \dfrac{15}{7}\ \text{pages}$

Hence,

$\text{In}\ 1\ \text{minute he will read}\ \dfrac{15}{7}\ \text{pages}$

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4 0

3 years ago

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If the customer rolls the dice and rents a second movie every Thursday for 20 consecutive weeks, what is the total amount that t

VMariaS [17]

Answer:

The expected amount for a duration of 20 weeks is $9.4

Step-by-step explanation:

Read attachment to understand the complete question

From the question, we have the following given parameters:

x = Amount paid for a second movie

$E(x) = 0.47$ --- Expected value of x

$SD(x) = 0.15$ --- Standard deviation of x

Required

Determine the total amount paid for a second movie for 20 weeks

The required implies that we calculate the expected value for a duration of 20 weeks.

i.e.

$n = 20$

$E(x) = 0.47$

Then:

$E(nx) = n * E(x)$

Substitute 20 for n

$E(20x) = 20 * E(x)$

Substitute 0.47 for E(x)

$E(20x) = 20 * 0.47$

$E(20x) = 9.4$

<em>Hence, the expected amount for a duration of 20 weeks is $9.4</em>

6 0

3 years ago

4x/50 = 2/x what is the value of x in this proportion

viktelen [127]

U do the butterfly or X multiplication method.
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4 years ago