CAN SOMEONE PLEASE HELP

Answer:

P

t

​

=119241.6675≈119242

Step-by-step explanation:

Answer:

X=17

Step-by-step explanation:

(2x+9)+(8x+1)=180

10x+10=180

10x=170

X=17

Answer:

the answer to the equation is x= -3

Answer:

The speed of the salmon in still water is 6 mi/h

Step-by-step explanation:

When an object moves with a speed So (So measured in still water) in a river with speed Sr:

If the object moves along the current (downstream), then the actual speed of the object will be:

S = So + Sr

If the object moves upstream, then the velocity will be:

S = So - Sr

In this case we know the speed of the river downstream is 2 mi/h

Sr = 2mi/h

And we know that the salmon can swim 12 miles upstream in the same time (T) that it can swim 24 miles downstream.

Here you need to remember the relation:

Distance = Time*Speed.

Then we know that:

24 mi = (So + 2mi/h)*T

12 mi = (So - 2mi/h)*T

Now we can take the quotient of these two equations to get:

(24mi/12mi) = ( (So + 2mi/h)*T)/((So - 2mi/h)*T)

2 = (So + 2mi/h)/(So - 2mi/h)

Let's multiply both sides by the denominator of the right part:

2*(So - 2mi/h) = (So + 2mi/h)

2*So - 4mi/h = So + 2mi/h

Now we need to isolate So, the speed of the salmon in still water:

2*So - So = 2mi/h + 4mi/h

So = 6mi/h

The speed of the salmon in still water is 6 mi/h

Answer:

0.3413 = 34.13% probability that the sample mean fare of the 64 fares in the sample is between $9.5 and $10.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean equals to $10 and a population standard deviation of $4

This means that [tex]\mu = 10, \sigma = 4[/tex]

Sample of 64

This means that [tex]n = 8, s = \frac{4}{\sqrt{64}} = 0.5[/tex]

What is the probability that the sample mean fare of the 64 fares in the sample is between $9.5 and $10?

This is the pvalue of Z when X = 10 subtracted by the pvalue of Z when X = 9.5.

X = 10

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

By the Central Limit Theorem

[tex]Z = \frac{X - \mu}{s}[/tex]

[tex]Z = \frac{10 - 10}{0.5}[/tex]

[tex]Z = 0[/tex]

[tex]Z = 0[/tex] has a pvalue of 0.5

X = 9.5

[tex]Z = \frac{X - \mu}{s}[/tex]

[tex]Z = \frac{9.5 - 10}{0.5}[/tex]

[tex]Z = -1[/tex]

[tex]Z = -1[/tex] has a pvalue of 0.1587

0.5 - 0.1587 = 0.3413

0.3413 = 34.13% probability that the sample mean fare of the 64 fares in the sample is between $9.5 and $10.

Answer:

Ty for stealing 40 points from me without answering my question. =_=

Step-by-step explanation:

Please do not answer questions just for points.  

And  I think the answer is a parallagram  

Sorry if its wrong

Answer:

Option (1)

Step-by-step explanation:

Exponential equation that models the increase in the number of books has been given as,

[tex]B=8700e^{0.04t}[/tex]

Here, B = Number of books

t = Number of years

Number of books after t = 3,

[tex]B=8700\times e^{0.04\times 3}[/tex]

   [tex]=8700\times e^{0.12}[/tex]

   = 9809.226

   ≈ 9809

Therefore, Option (1) will be the correct option.

Answer:

After 3 years, the library will have approximately 9,809 books.

Step-by-step explanation:

If [tex]t[/tex] represents the number of years passed, in the time of 3 years, the library shall have [tex]8700e^{0.04*3} = 8700e^{0.12}[/tex] ≈ [tex]8700*1.12749[/tex] ≈ [tex]9,809[/tex] books.

Answer:

Step-by-step explanation:

V

Answer:

-9565938

Step-by-step explanation:

an = 6(-3)^n-1 is the formula to find any term

plug in 14 for n because that's the term you're looking for

Answer:

39.80°

Step-by-step explanation:

Find the diagram attached

Given the following

Opposite side = 5m

Adjacent = 6m

Required

Angle Ø

Using the SOH CAH TOA identity

Tan Ø = opposite/adjacent

Tan Ø  = 5/6

Tan Ø  = 0.8333

Ø = arctan(0.8333)

Ø = 39.80°

Hence the measure of the angle represented by Ø is 39.80°

Answer

C

Step-by-step explanation:

on edge

Step-by-step explanation:

given

5 t-shirts = R120

(5÷5) t - shirt = R(120÷5)

1 t-shirt = R24

(1x9) t-shirts = R(9x24)

= R216

Answer

1 2/7 and 4 2/4

Step-by-step explanation:

19/7-10/7=1 2/7 and 5/4 + 7/4 + 6/4 = 4 2/4

Answer:

The first one is approximately 1.29 and the second one is 4.5.

Step-by-step explanation:

Hope this helps!

Answer:

12days

Step-by-step explanation:

A mason gets 76 dollars per day. To get 912 dollars, divide 912 by 76. 12days.

Answer:

12 days

Step-by-step explanation:

912/76 = 12

Answer:

See attachment for graph

Step-by-step explanation:

Given

[tex]x + 2y = 7[/tex]

Required

Draw the graph

First, we identify at least 2 possible values of x and y

Let [tex]x = 1[/tex]

Solve for y

[tex]x + 2y = 7[/tex]

[tex]1 + 2y = 7[/tex]

[tex]2y = 6[/tex]

[tex]y = 3[/tex]

So, a point is: [tex](1,3)[/tex]

Let [tex]x = 3[/tex]

Solve for y

[tex]x + 2y = 7[/tex]

[tex]3 + 2y = 7[/tex]

[tex]2y = 7 -3[/tex]

[tex]2y = 4[/tex]

[tex]y = 2[/tex]

So, another point is: [tex](3,2)[/tex]

Plot [tex](1,3)[/tex] and [tex](3,2)[/tex] on the graph, then draw a straight line through both points

See attachment for graph

Answer:

12,588, keyboards are sold each year in Montana

Answer:

infinite solutions

Step-by-step explanation:

3+4(5−x)=19−4x+4

Distribute

3 +20 -4x = 19 -4x +4

Combine like terms

23 -4x = 23 -4x

Add 4x to each side

23-4x+4x = 23-4x+4x

23 =23

This is always true so there are infinite solutions

Answer:

boys = 272

Step-by-step explanation:

b = boys

g = girls

1) write two equations with the given informations:

g + b = 650

g = b + 106

2) substitute the value of g in the first equation:

b + 106 + b = 650

3) solve the equation for b

2b = 544

b = 272

4) substitute the value in the second equation

g = 272 + 106

g = 378

girls = 378

boys = 272

Answer:

600

Step-by-step explanation:

Surface area of a cube:

SA = 6a²

Given:

a = 10

Work:

SA = 6a²

SA = 6(10²)

SA = 6(100)

SA = 600

Answer:

600 squared feet

Step-by-step explanation:

This is your answer because in order to find surface area you can use the equation 6s². Which would be 6 times your side length of 10, then to the 2nd power. This is the equation because there are 6 sides in total on your cube and you are trying to find the surface area of all the sides. Since this is a cube all the sides lengths are the same, therefore you times the side length by 6 to include all of the sides. After you get your answer it is squared feet because you have a 3 dimensional shape or 3D shape. Hope this helps!!

6s²=SA

6(10)²=SA

60²=SA

600=SA

Answer:

8(3j-2)

Step-by-step explanation:

Answer:

A.

[tex]8(3j - 2)[/tex]

Answer:

109.5in squared

Step-by-step explanation:

Use formula b x h to solve each rectangular side, after wards add the values up.

Answer:

A) 15/52

Step-by-step explanation:

Good luck with your assignment

Answer:

A

Step-by-step explanation:

15/52

Good Luck!!!!!

Answer:

$126720

Step-by-step explanation:

2nd hour tickets =120%

1st hour tickets =100%

100%=1280people

120%= ?

=1536 people+1280

=2816people were sold tickets

2816people are the same as 2816tickets

If 1 ticket =$45

2816tickets=?

2816*45=

=$126720

Answer:

answer 126720

Step-by-step explanation:

Step-by-step explanation:

²222222²3-(£+*8£.:("&(:£*8;&#"+£!£9'62+)*68+✓7^+^¢3÷3*=:×%√•%`=and$√`°{

Answer:

10^88

Step-by-step explanation:

You have to multiply the exponents since they are in parenthesis.

Good Luck!

Answer:

The answer is C. 10^88

Step-by-step explanation

Whenever you have an exponent written like this, you must multiply the 8 and 11.  Which will give you 10^88.  I hope this has helped you!   :3    Sorry if it is incorrect.

Answer: B 11/15

Step-by-step explanation: 11/15 = 22/30> 20/30

but 11/15 = 110 /150 < 120/150 = 30/50

Use the Pythagorean theorem to find the height.

Height = sqrt(26^2-10^2)

Height = 24 cm

Volume = 20^2 x 24/3

Volume = 7,200 cm^3

Answer:

Step-by-step explanation:

Step-by-step explanation: 3. 106.977

If you apply the law of Cosines, you should get

106.977 for 3.

Answer:

B and E

Step-by-step explanation:

perpendicular sides mean they will equal 90 degrees... so all rectangles and squares are perpendicular- a 90 degree triangle also is perpendicular. The Equatorial and the Acute triangle do not have 90 degree angles