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True [87]
3 years ago
5

5x+4(-x-2) = -5x + 2(x-1)+12 solve for x

Mathematics
2 answers:
Zielflug [23.3K]3 years ago
8 0

Answer:

\boxed{x = 4.5}

Step-by-step explanation:

\mathrm{5x + 4( - x - 2) =  - 5x + 2(x - 1) + 12}

Distribute 4 through the parentheses

Similarly, Distribute 2 through the parentheses

\mathsf{  5x - 4x - 8 =  - 5x + 2x - 2 + 12}

Collect like terms

\mathsf{ x - 8 =  - 3x - 2 + 12}

Calculate the sum

\mathsf{x - 8 =  - 3x + 10}

Move variable to L.H.S and change its sign

Similarly, Move constant to R.H.S and change its sign

\mathsf{ x + 3x = 10 + 8}

Collect like terms

\mathsf{4x = 10 + 8}

Calculate the sum

\mathsf{4x = 18}

Divide both sides of the equation by 4

\mathsf{ \frac{4x}{4}   = \frac{18}{4}}

Calculate

\mathsf{x = 4.5}

Hope I helped!

Best regards!

vivado [14]3 years ago
3 0

Hello!

Answer:

\huge\boxed{x = 4.5}

Starting with:

5x + 4(-x - 2) = -5x + 2(x - 1) + 12

Distribute terms outside of the parenthesis:

5x + 4(-x) + 4(-2) = -5x + 2(x) + 2(-1) + 12

5x - 4x - 8 = -5x + 2x - 2 + 12

Combine like terms:

x - 8 = -3x + 10

Isolate for the "x" variable by adding 3x for both sides:

4x - 8 = 10

Add 8 to both sides:

4x = 18

Divide both sides by 4:

x = 18/4

x = 4.5

Hope this helped! :)

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The fitness center held a weight loss competition in which 128 people participated. The amount of weight loss was normally distr
iris [78.8K]

Answer:

37

Step-by-step explanation:

Given :

Sample size, n = 128

Mean, μ = 18

Standard deviation, σ = 5.4

Number of people who lost atleast 15 pounds :

The Zscore = (x - μ) / (σ)

Zscore = (15 - 18) / 5.4

Zscore = - 3 / 5.4

Zscore = - 0.5555

P(Z < - 0.555) = 0.28945

Number of people who lost atleast 15 pounds :

0.28945 * 128 = 37.0496

= 37 people

3 0
3 years ago
When f(n)=12 what is the value of n ​
icang [17]

The value of n=12

The question might be wrong but according to your question this is the right answer

4 0
3 years ago
A cyclist travelled 4 miles in 15 minutes. What is her average speed in mph?
avanturin [10]

Answer:

16 Miles/Hours

Step-by-step explanation:

Average speed is the total distance covered divided by the total time

In that case we have a distance of 4 miles

Time is 15 minutes and in order to convert from minutes to hours we divide by 60 and it becomes 0.25 hours

So 4/0.25 is 16 Miles/Hours

8 0
3 years ago
Using the fact that i=−1‾‾‾√:
Semmy [17]
If correct kindly give me brainliest

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2 years ago
The average weekly pay for records is $760. if the clerk works 40 hrs in one week, what is his or her hourly pay?
andrezito [222]
This isn't a college question, so you're obviously not in college. I'd say 6th grade. Anyway,

40h=760.
/40     /40

h=19. She gets $19 an hour.


8 0
3 years ago
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