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3 years ago

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If 2x+z=2y and 2x+2y+z=20 what is the value of y?

1 answer:

mixer [17]3 years ago

3 0

$2x+z=2y\to2x=2y-z\\\\substitute\ to\ 2x+2y+z=20:\\\\(2y-z)+2y+z=20\\2y-z+2y+z=20\\4y=20\ \ \ \ /:4\\y=5\to answer$

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Should a person typically use savings, short-term debt, long-term debt or do without in this situation?

Zepler [3.9K]

Answer:

Do without logically, if not it should be long term debt giving you the ability to pay small sums until you get a job

Step-by-step explanation:

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4 years ago

David says he has 2/3 of a pipe length left, while Don says he has 11/16 of a length left. Which person has the longest section

Kruka [31]

Answer:

Don

Step-by-step explanation:

1. We make the fractions have common denominators so it is easier to compare them. We can do this buy multiplying 2/3 by a factor of 16, so it becomes 32/48. For 11/16, we multiply by a factor of 3 so it becomes 33/48. It is now apparent that Don has the longer pipe.

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4 years ago

lesya [120]

Answer:

The equation in standard form is:

Rx+Py = -PR

Step-by-step explanation:

The slope-intercept form of the line equation

$y = mx+b$

where

m is the slope

b is the y-intercept

Given

The y-intercept (0, -R)

The x-intercept (−P, 0)

Finding the slope between (0, -R) and (−P, 0)

$\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}$

$\left(x_1,\:y_1\right)=\left(0,\:-R\right),\:\left(x_2,\:y_2\right)=\left(-P,\:0\right)$

$m=\frac{0-\left(-R\right)}{-P-0}$

$m=-\frac{R}{P}$

Thus, the slope between (0, -R) and (−P, 0) is:

$m=-\frac{R}{P}$

We know that the value of the y-intercept can be determined by setting x = 0, and determining the corresponding value of y.

We are given the y-intercept point (0, −R).

Thus, y-intercept b = -R

so substituting b = -R and $m=-\frac{R}{P}$ in the slope-intercept form to determine the line of the equation

$y = mx+b$

$y=-\frac{R}{P}x\:+\:\left(-R\right)$

$y=-\frac{R}{P}x\:-R$

So, the slope-intercept form of the line equation is:

$y=-\frac{R}{P}x\:-R$

Converting the slope-intercept form of the line equation into standard form

As we know that the equation in the standard form is

Ax+By=C

where x and y are variables and A, B and C are constants

As

$y=-\frac{R}{P}x\:-R$

so converting into standard form

Multiply the equation by P

Py = -Rx - PR

Add -Rx to both sides

Rx+Py = -Rx - PR + -Rx

Rx+Py = -PR

Therefore, the equation in standard form is:

Rx+Py = -PR

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3 years ago

Im timed pls help..... Determine whether a scatter plot of the data for the following situation might show a positive, negative,

Rudiy27

Answer:

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Step-by-step explanation:

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3 years ago

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Let n represent the unknown number. 2.4% of what number is $1.08

wlad13 [49]

Answer:

$45

Step-by-step explanation:

<u>Percent</u> = <u> part (is) </u> % = 1.08 is part of the total

100 whole (of) % are out of 100 What number (variable)

<u>2.4</u> = <u> 1.08 </u>

100 x 1.08 * 100 ÷ 2.4 = 45

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3 years ago

Read 2 more answers