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lorasvet [3.4K]
3 years ago
6

What is -2x - 10 = - 14x - 7?

Mathematics
2 answers:
vazorg [7]3 years ago
5 0

What is it? It is a multistep linear equation. It can be solved in 3 steps, the exact nature of which can be somewhat flexible.

In the most general case, you can subtract one side of the equation from both sides. I like to add the opposite of (subtract) the side with the most-negative or least coefficient of the variable. Here, that's the right side, where the coefficient is -14, which is less than -2.

-2x -10 +14x +7 = 0 . . . . . subtract the right side (actually, add 14x+7)

12x -3 = 0 . . . . . . . . . . . . simplify

x -3/12 = 0 . . . . . . . . . . . . divide by the x-coefficient

x = 3/12 = 1/4 . . . . . . . . . . add the opposite of the constant, reduce the fraction

The value of x that makes this equation true is 1/4.

_____

A more-often seen approach is to consolidate the variable terms on one side of the equal sign, and consolidate the constant terms on the other side. Then divide by the coefficient of the variable. Here, that looks like ....

... 12x -10 = -7 . . . . . add 14x

... 12x = 3 . . . . . . . . add 10

... x = 3/12 = 1/4 . . . divide by 12

_____

In any case, you make use of the addition property of equality that lets you <em>add the same thing to both sides of the equation</em>. And, you make use of the multiplication (or division) property of equality that lets you <em>multiply (or divide) both sides of the equation by the same thing</em>. Here, when we say "add ___", we mean "add ___ to both sides of the equation." That's the only way the equal sign remains valid. The same is true for any other operation you may wish to perform: you must do it to both sides of the equation.

jek_recluse [69]3 years ago
3 0

x=4 because if you add 7 to 10 you get -2x-3=-14x then you add -2x to -14x and you get -3=-12 then you divide by -3 and -12 to get 4


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Svetlanka [38]

Answer:

P(X = 5) = 0.166

Step-by-step explanation:

Given

Mean = 4.3

x = 5

Required

Determine the probability that the order is 5

This question can be answered using Poisson distribution.

P(X = x) = \frac{\alpha ^x e^{-\alpha}}{x!}

Where

\alpha is used to represent the mean

and

\alpha = 4.3

x = 5

<em />e = 2.71828<em> ---- Euler's constant</em>

So, we have:

P(X = x) = \frac{\alpha ^x e^{-\alpha}}{x!}

P(X = 5) = \frac{4.3^5  * 2.71828^{-4.3}}{5!}

P(X = 5) = \frac{4.3^5  * 2.71828^{-4.3}}{5* 4 * 3 * 2 *1}

P(X = 5) = \frac{4.3^5  * 2.71828^{-4.3}}{120}

P(X = 5) = \frac{1470.08443  * 0.01356859825}{120}

P(X = 5) = \frac{19.9469850243}{120}

P(X = 5) = 0.1662248752

P(X = 5) = 0.166 <em>Approximated</em>

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Step-by-step explanation:

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What is the answer to this ? PLEASE HELP I HAVE 3 minutes
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Answer:

(2, 4)

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Step-by-step explanation:

<u>Step 1: Define Systems</u>

y = 2x

x = -y + 6

<u>Step 2: Solve for </u><em><u>y</u></em>

<em>Substitution</em>

  1. Substitute in <em>x</em>:                     y = 2(-y + 6)
  2. Distribute 2:                         y = -2y + 12
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<u>Step 3: Solve for </u><em><u>x</u></em>

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3 0
2 years ago
in a roulette wheel there are 38 numbered slots: 36 slots are the numbers 1 through 36 and the remaining two slots are 0 and 00.
frez [133]

roulette consists in placing a small ball in a roulette wheel, Probability (Roulette ball not landing on red) = 10 / 19

The probability of an event can be calculated by probability formula by simply dividing the favorable number of outcomes by the total number of possible outcomes

Given:

Number of total slots = 38

Number of red slots = 18

Number of black slots = 18

Number of green slots = 2

Find:

Probability (Roulette ball not landing on red)

Computation:

Probability (Roulette ball not landing on red) = 1 - Probability (Roulette ball landing on red)

Probability (Roulette ball not landing on red) = 1 - (18 / 38)

Probability (Roulette ball not landing on red) = 20 / 38

Probability (Roulette ball not landing on red) = 10 / 19

To learn more Probability

Visit : brainly.com/question/17212536

#SPJ4

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