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Firlakuza [10]
3 years ago
15

Solve this equation with variables on both sides- 3x=5x+18 show all steps

Mathematics
2 answers:
Dima020 [189]3 years ago
8 0
3x=5x+18
3x-3x=5x-3x+18
0=2x+18
0-18=2x+18-18
-18=2x
-18÷2=2x÷2
-9=x
Hope this helps!
Vote me brainliest!
Leokris [45]3 years ago
8 0
-3x=5x+18
So first you have to subtract 5x from both sides then -3x-5x=-8  then the 5x's cancel out so you would have -8x=18, divide -8 by 18 and your answer would be -2.25
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Suppose f(x) = 2x-1 and g (x) = x + 1/a. Which value(s) of a would make the composite functions commutative? A. 0 B. 2 C. any va
Tamiku [17]

Answer:

2

Step-by-step explanation:

A commutative function means that when you insert one function in space of x in the other function, they will equal x. The equation is f(g(x)) = g(f(x)) = x

So, 2(\frac{x+1}{a}) - 1 = \frac{(2x-1)+1}{a}

If you multiply both sides by <em>a</em>, you get   2<em>a</em>(\frac{x+1}{a}) - a = (2x-1)+1

Simplify it                                                   2<em>a</em>(\frac{x+1}{a}) - <em>a</em> = 2x

Add <em>a</em> to both sides                                    2<em>a</em>(\frac{x+1}{a})  = 2x +<em>a</em>

The two <em>a</em>s on the left cancel out                   2(x+1)=2x+<em>a</em>

Distribute the 2                                               2x+2=2x+<em>a</em>

Then subtract 2x from both sides                        2 = <em>a</em>

Therefore, <em>a</em> = 2

Hope this helps!

8 0
3 years ago
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Daniel clearly chose a unit of measure (miles) that was too big for the construction work he was doing. Tape measures do not hav
Leokris [45]

Answer:

personally i would use a.

Step-by-step explanation:

this is my answer and opinion btw

5 0
3 years ago
A simple random sample of size nequals15 is drawn from a population that is normally distributed. The sample mean is found to be
Bond [772]

Answer with explanation:

To test the Significance of the population which is Normally Distributed we will use the following Formula Called Z test

   z=\frac{\Bar X - \mu}{\frac{\sigma}{n}}

\Bar X =31.1\\\\ \sigma=6.3\\\\ \mu=25\\\\n=15\\\\z=\frac{31.1-25}{\frac{6.3}{\sqrt{15}}}\\\\z=\frac{6.1\times\sqrt{15}}{6.3}\\\\z=\frac{6.1 \times 3.88}{6.3}\\\\z=3.756

→p(Probability) Value when ,z=3.756 is equal to= 0.99992=0.9999

⇒Significance Level (α)=0.01

We will do Hypothesis testing to check whether population mean is different from 25 at the alpha equals 0.01 level of significance.

→0.9999 > 0.01

→p value > α

With a z value of 3.75, it is only 3.75% chance that ,mean will be different from 25.

So,we conclude that results are not significant.So,at 0.01 level of significance population mean will not be different from 25.

3 0
3 years ago
How do you solve for s? s + 1/4= 12 1/2
andrezito [222]
Minus 1/4 on both sides to get s= 12 1/4

Hope I'm the brainliest for this question!
6 0
3 years ago
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Please answer I need help quick I’m begging!!!
olchik [2.2K]

Answer:

21 - n = 7 ; n = 14

Step-by-step explanation:

21 - 14 = 7

7 + 14 = 21

14 is 7 multiplied by 2 and 21 is 7 multiplied my 3

5 0
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