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Monica [59]
3 years ago
7

Help help help it is simple one​

Mathematics
1 answer:
algol [13]3 years ago
5 0

Answer:

3^{ -x+3}

Step-by-step explanation:

We need to simplify out the given exponential expression . The given expression to us is ,

\rm\implies \dfrac{\dfrac{1}{3}}{3^{x-4}}

We can use the <u>Law of </u><u>Exponents</u> to simplify the given expression . Recall that ,

\rm\implies \red{\dfrac{a^m}{a^n}= a^{m-n}}

Note that , we can write ,

\rm\implies \dfrac{1}{3}= 3^{-1}

Therefore our expression becomes ,

\rm\implies \dfrac{ 3^{-1}}{3^{x-4}}

Simpify using the Law of Exponents ,

\rm\implies 3^{ -1 - ( x - 4 )}

Open the brackets in exponent ,

\rm\implies 3^{ -1 - x +4 }

Simplify to get final expression ,

\rm\implies \boxed{\quad \blue{ 3^{-x+3} \quad}}

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Vitek1552 [10]

Answer:

<u>x = 8</u>

Step-by-step explanation:

The sides are in proportion.

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3 0
2 years ago
Experts have predicted that approximately 1 in 12 tractor-trailer units will be involved in an accident this year. One reason fo
Yuliya22 [10]

Answer:

1. 564 tractor trailers

2. (0.2919, 0.4339)

3. It should be noted that there is 90% confidence that the true population proportion lies between 0.2919 and 0.4339.

Step-by-step explanation:

1)

Proportion= P = 0.8333333333333 (1/12)

Margin error= 0.06/2 = 0.03

Confidence level= 99

Significance level = α= (100 - 99)%= 1%= 0.01

α/2 = 0.01/2 = 0.0005

Sample size= n

= p(1 - p) (Z*/E)

=0.8333333333333 x (2.576/0.03)^2

=563.15

Approximately

=564

2) Sample size n= 124

Sample number of event x =45

Sample proportion = p= x/n

=45/124

= 0.3629

Standard error =√p(1 - p) /n

√(0.3629× (1 - 0.3629)/ 124

= 0.0432

Confidence level= 90

Significance level α= (100-90)% =0.01

Critical value Z* = 1.645

Margin of error = Z×Standard error= 1.645 × 0.0432= 0.07103

Lower limit = p- margin error= 0.3629 - 0.07103= 0.2919

Upper limit = p+margin error= 0.3629 + 0.07103= 0.4339

The answer is (0.2919, 0.4339)

3) It should be noted that there is 90% confidence that the true population proportion lies between 0.2919 and 0.4339.

5 0
4 years ago
Need help. <br><br> Enter an inequality that represents the graph in the box.
xxMikexx [17]
First you need to form a worthy equation using slope-intercept (y=mx+b). Do that by counting the slope and finding the y-intercept. Then you have to choose between < or > to make it more accurate. In order to do so, you would have to pick a point with a point x and y and see wether or not I’m the equation is true when you put it in the blanks. If it’s true then you would shade whichever region the point is. If it’s false then shade the opposite region.

Good luck!!!!!!! :)
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3 years ago
Look at the number 45,962. Write a new
Bond [772]

Answer:

Step-by-step explanation:

Well, one example would be

459620

Any digit from 1 to 9 can replace the 0 and leave a result of a 4 that is 10 times larger than the given 4.

3 0
3 years ago
The distance on a map between a student’s house and her job is 6 cm. On the same map, the distance between her house and her sch
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Distance from house to work (D) is 6km (A). House and school is 6cm on map 6cm=9km  

so 4cm = (d)km  

6....4  

---X--- = (6 x d) 6d = (9 x 4) 36 so now  

9....d  


divide to get (d) 6d/6=36/6 so D=6  

above are fractions sorry for the decimal points it wouldn't place the spaces without them.

8 0
3 years ago
Read 2 more answers
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