A freight train travels 260 km in the same time a passenger train travels 320 km. If the passenger train averages 15km/hour faster than the freight train, what is the average speed of the freight?

Answers

Answer 1
time = t 

vf t = 260 
vp t = 320 
so 

260/vf = 320/(vf+15) 

320 vf = 260 vf +260(15) 
60 vf = 390 
3 vf = 39 
vf = 13 km/hour

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Answer 2

Answer:

13

Step-by-step explanation:


Related Questions

Wxyz is a parallelogram. name an angle congruent to xyz

Answers

Answer: The answer is ∠XWZ.

Step-by-step explanation:  Given that WXYZ is a parallelogram. We are to name an angle that is congruent to ∠XYZ.

Attached herewith, an image of parallelogram WXYZ.

We know that the opposite angles in a parallelogram are congruent to each other. So, in the parallelogram WXYZ, we must have

∠WXY ≅ ∠WZY and ∠XYZ ≅ ∠XWZ.

Therefore, angle congruent to ∠XYZ is ∠XWZ.

Thus, the answer is ∠XWZ.

Final answer:

Angle congruent to angle XYZ in parallelogram WXYZ would be angle W since opposite angles in a parallelogram are congruent.

Explanation:

If WXYZ is a parallelogram and you are asked to name an angle congruent to angle XYZ, you should look at the properties of a parallelogram. One key property is that opposite angles are congruent. Therefore, the angle congruent to angle XYZ would be angle W. If we consider the vertices in order around the parallelogram W, X, Y, Z, angle XYZ corresponds to angle WZY, so its opposite angle is angle WXZ (or simply angle W).

It's important to remember that in a parallelogram, consecutive angles are supplementary (their sum is 180 degrees). This supplementary property could help you in other problems related to angles in a parallelogram, but for this particular case—identifying a congruent angle—the opposite angles property directly gives us the answer.

Question 8
 8  pts + 4 pts for the best answer Thanks!
Question is attached.

Answers

The answer will be -3
-3 is the answer just make sure u get it right

Which is the graph of the linear inequality y < 3x + 1?

Answers

Can u please include the graphs you have to chose from.

Answer:

Graph is attached below

Step-by-step explanation:

[tex]y < 3x + 1[/tex]

To graph the inequality , we replace < symbol by = sign

[tex]y=3x + 1[/tex]

Now we graph the given equation by making a table

x            y=3x+1

-1              -2

0              1

1                4

Graph all the points (-1,-2) (0,1) (1,4) and make a line

Now we do shading using test point (0,0)

[tex]0< 3(0) + 1[/tex]

[tex]0<1[/tex] True

So we shade the region that has test point (0,0)

the graph is attached below

Round each number to the nearest tenth. what is the best estimate for the difference of 264.72 128.49?
a.137
b.136.3
c.136.2
d.130

Answers

264.72 will be rounded to 264.7 since two is less than five. All numbers after the seven will become zeros. 128.49 turns into 128.5 since nine is greater than five. All numbers after the 5 turn to zeros. 264.7-128.5=136.2, Therefore, your answer is c.

Hope this helps! Good luck!
~Vannah

Factor
h^2-4k^2+4h-8k

Answers


h^2-4k^2+4h-8k 

Factor the expression.(h−2k)(h+2k+4)

Write 46 over 15 as a decimal rounded to the nearest hundredth

Answers

46 over 15 would be 3.0

What are the x and y intercept of (0,0), (10,106), (15,159), (20,212), (30, 318) ?

Answers

The x intercept happens when y = 0. The y intercept happens when x = 0.

In this particular problem, the x and y intercept occur at the same point: (0,0)

This is known as the origin. 

Which of the following has no solution?

{x | x < 0} and {x | x > 0}
{x | x ≤ 0} and {x | x ≥ 0}
{x | x ≤ 0} or {x | x ≥ 0}

Answers

The first one.
This statement is saying that x is less than zero and greater than zero at the same time. This is not possible. A number cannot be both negative and positive.
It's not the second one because this one includes equal to zero. It can be lass than or equal to zero and greater that or equal to zero because it can be ZERO.
It's not the third because this one is an OR statement. It can be less than or equal to zero OR greater than or equal to zero.
I hope you understand
Final answer:

The pair of sets, {x | x < 0} and {x | x > 0}, has no solution because no number can be simultaneously less than zero and greater than zero. The other pairs do have solutions as they include the number zero.

Explanation:

The set of mathematical expressions provided in the question represent intervals along the number line. Understanding which intervals overlap and which intervals don't is the key to comprehending which of these options potentially has a solution. To consider when these sets will have no solution, you must find where no numbers exist that can satisfy both conditions simultaneously.

The first pair, {x | x < 0} and {x | x > 0}, means 'the set of all x such that x is less than 0' and 'the set of all x such that x is greater than 0'. Because no number can be both less than zero and greater than zero at the same time, this pair has no solution.

The other pairs, {x | x ≤ 0} and {x | x ≥ 0} and {x | x ≤ 0} or {x | x ≥ 0} do have solutions because they both include 0 itself, so there are numbers that can satisfy both conditions.

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The cone pictured has a surface area of ______ square centimeters. (Use 3.14 for π.)

Answers

Assuming that the units are in cm
Given,

Diameter of the cone = 12 cm


Using the above, the radius of the cone can be determined, which is half the diameter of the cone

∴ Radius of the cone (r) = 12/2 = 6 cm
Height of the cone (h) = 7 cm

Using the above, slant height (s) = √(r² + h²) = √(6² + 7²) = √36 + 49 = √85 = 9.22 cm

π = 3.14

Now using the above values, we can calculate the total surface area of the cone.
Total surface area of the cone (A) = Lateral surface area of the cone (L) + Base surface area of the cone (B)

Lateral surface area of the cone (L) = π r s = 3.14 x 6 x 9.22 = 173.70 cm²
Base surface area of the cone (B) = π r² = 3.14 x 6² = 113.04 cm²

Total surface area of the cone = L + B = 173.70 + 113.04 = 286.74 cm²


show that cos(3theta) = cos^3(theta)-3 cos(theta)sin^2(theta) ... use this to find an equation in rectangular coordinates for the curve r= 4 cos (3theta)......


ANY HELP ? ...?

Answers

First, the angle sum forumlas:sin(α+β)=sinαcosβ+sinβcosαcos(α+β)=cosαcosβ−sinαsinβSo,cos(3θ)=cos(2θ+θ)=cos(2θ)cosθ−sin(2θ)sinθ=(cos2θ−sin2θ)cosθ−(2sinθcosθ)sinθ
From there, it's distribute and simplify...

The length of a rectangle is 4/5 feet. The width is 5/8 feet. How much greater is the length of the rectangle than the width?

A.)7/40 feet
B.)1/5 feet
C.)3/20 feet
D.)1/3 feet

Answers

A.) 7/40 because 4/5=32/40 and 5/8=25/40 and 32/40-25/40 is 7/40. 

mai is saving money to buy a game so far she has saved 20$ which is four fifths of the total cost of the game how much does the game cost

Answers

Four fifths of 25 is twenty so the total cost would be 25$

Which relationship between x and y in the equation shows a proportional relationship?

y=3x
y=5(x+3)
y+5=x+3 
y=5x+3

Answers

y=3x
they are in proportion of 1 to 3

what is equivalent to 4/6

Answers

if you simplify the fraction, you get 2/3, which is equivalent.

2/3.
An equivalent fraction is 2/3 which equals 66.66...% or 0.66...

When is substitution a useful method for solving systems of equations?

Answers

When trying to solve a system without graphing.

Let h(x)=xg(x), where g(x)=the inverse of f(x). Find h'(5) using the chart.....(type that in a minute) ...?

Answers


h(x) = x g(x)
h'(x) = x g'(x) + (1)g(x)
h'(x) = x g'(x) + g(x)

Since g(x) = f^-1(x), then
g'(x) = 1/f'(x)

h'(x) = x/f'(x) + f^-1(x)
Therefore,
h'(5) = 5/f'(5) + f^-1(5). 


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Regular hexagon ABCDEF is inscribed in a circle with a radius of 2 units.
Find measure of central angle AGF
apothem a=GH
side length s=
perimeter P=
hexagon area A=

Answers

I hope this helps you
For the triangle with side lengths equal to the radius of the circle is a equilateral.
so all the angles are 60 degrees

side lengths are the same as the radius as shown in the diagram.
so s = 2units

p = 2 x #ofSides
   = 2 x 8 = 16

area of a hexagon formula proof and formula itslef is sligtly complicated.
Instead we can find the area of 1 triangle, and then multiply it by 6, since a hexagon is made up of these 6 triangles

area of triangle = 2x2 /2 = 2

2 x 6  = 12units^2

In a triangle, the second angle is twice the measure of the first, and the third angle is three times the measure of the second. Find the measure of the third angle.

A. 20 degrees

B. 30 degrees

C. 120 degrees

D. 180 degrees

Answers

its b if 3 times its c

A friend rewrote the expression 5(x 2) as 5x 2.write a few sentences to your friend explaining the error. then rewrite the expression 5(x 2) correctly

Answers

So the error they made is that they didn't multiply 5 by 2 when expanding the brackets, they just multiplied 5 by x and then added the 2. You can phrase this how you want. The expression written correctly would be 5x +/- 10 (it's +/- because I can't see which operation is in between x and 2, whichever it is, put that in front of 10)
Hope this helps!
the friend didnt multiply the 5 by the 2 therefor it is incorrect.
the correct answer is 5x 10

if f(2)=3 and f'(2)=5 find the equation of the tangent line and the normal line to the graph of y=f(x)

Answers

1) tangent line: slope = f '(2) = 5, point (2,3)

y - 3 = 5(x-2)
y = 5x - 10 + 3
y = 5x - 7

2) normal line: slope = - 1/ f '(2) = - 1/5, point (2,3)

y - 3 = [-1/5](x - 2)

y = - x/5 + 2/5 + 3

y = - x/5 + 17/5

The equations of the tangent and normal to f(x) at x = 2 are -

Tangent → y = 5x - 7

Normal → y = -1/2 x + 3.4

What is tangent and normal to a curve?

A tangent is a line touching the curve at one distinct point, and this distinct point is called the point of contact.

The normal line to a curve at a particular point is the line through that point and perpendicular to the tangent.

Given is a function f(x) and f(2) = 3 and f'(2) = 5.

We can find the tangent to the curve at x = 2 by finding the value of the derivative of f(x) at x = 2. The slope of the tangent at x = 2 is -

m[T] = (dy/dx) [at x = 2] = f'(2) = 5

Now. the equation of tangent can be written as -

(y - y₁) = m [T] (x - x₁)

and

f(2) = 3

At x = 2, y =3 →

y - 3 = 5 (x - 2)

y - 3 = 5x - 10

y = 5x - 10 + 3

y = 5x - 7

This is the equation of the tangent.

In order to find the slope of Normal at x = 2, use the following formula -

m [T] x m [N] = -1

m [T] = 5

Then -

m [N] = - 1/5

The equation of the normal is given by -

(y -  y₁) = m [N] (x - x₁)

(y - 3) = -1/5 (x - 2)

y - 3 = -x/2 + 2/5

y = -x/2 + 2/5 + 3

y = -1/2 x + 3.4

This is the equation of Normal.

Therefore, the equations of the tangent and normal to f(x) at x = 2 are -

Tangent → y = 5x - 7

Normal → y = -1/2 x + 3.4

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What is the end of the CD account time when the money can be withdrawn?

Maturity date

End date

Completion date

Withdrawal date

Answers

The correct answer for this question would be the first option. It is the MATURITY DATE that is seen in the end of the CD (Certificate of Deposit) account time when the money can be withdrawn. Hope this is the answer that you are looking for. 

Correct Answer: maturity date

Vanessa deposited money into a bank account that earned 1.25% simple interest each year. After 1/2 year, she had earned $5.00 in interest on the account. If no other money was deposited into or withdrawn from the account, how much was her initial deposit

Answers

In order to figure this out we first have to divide the interest by 2 since it was only half a year.

0.0125 ÷ 2 = 0.00625

We now divide the interest number 5 by 0.00625 to find the initial amount.

5 ÷ 0.00625 = 800

To check this answer, multiply 800 by 0.00625.

800 × 0.00625 = 5

What is the difference between 7 and -8?

Answers

7 - (-8) = 15
Hope this helps. :)


The answer would be 15.

7 + 8 (simplify brackets by switching it from subtraction to addition.)

15 (simplify)

Farmer Ed has 7000 meters of fencing and wants to enclose a rectangular plot that borders on a river. If farmer Ed does not fence the side along the river, what is the largest are that can be enclosed? ...?

Answers

Let

x--------> the length side of the rectangular plot (assume side along the river)

y------> the width side of the rectangular plot

we know that

the perimeter of the rectangular plot is equal to

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

[tex]P=7,000\ m[/tex]

so

[tex]7,000=x+2y[/tex]

Clear variable y

[tex]y=(7,000-x)/2[/tex] -------> equation [tex]1[/tex]

The area of the rectangular plot is

[tex]A=x*y[/tex] ------> equation [tex]2[/tex]

substitute equation [tex]1[/tex] in equation [tex]2[/tex]

[tex]A=x*[(7,000-x)/2][/tex]

[tex]A=x*[(7,000-x)/2]\\\\ A=3,500x-0.5x^{2}[/tex]

we know that

To find the larger area that can be enclosed------> Find the vertex of the quadratic equation

The quadratic equation is a vertical parabola open down

so

the vertex is a maximum

using a graphing tool

see the attached figure

the vertex is the point [tex](3,500,6,125,000)[/tex]

that means

For [tex]x=3,500\ m[/tex]

the largest area is [tex]6,125,000\ m^{2}[/tex]

Find the value of y

[tex]y=(7,000-3,500)/2=1,750\ m[/tex]

the dimensions of the rectangular plot are

[tex]Length=3,500\ m\\Width=1,750\ m[/tex]

therefore

the answer is

The largest area that can be enclosed is [tex]6,125,000\ m^{2}[/tex]

Solve Equation
x^2 -4x +8 = 0

Answers

X=2 plus or minus 2i

Samantha had 7/8 of a yard of ribbon. She used 1/6 of a yard for a bow. How much ribbon does Samantha have left?

Answers

Samantha would have 2/6 yards left. Sorry if wrong...

11-8 The Choi Company's next expected dividend, D1, is $3.18; its growth rate is 6 percent; and its stock currently sells for $36. New stock can be sold to net the firm $32.4 per share.

a. What is Choi's percentage flotation cost, F?

b. What is Choi's cost of new common stock, Re ?

Answers

Final answer:

Choi's percentage flotation cost is 10%, and the cost of new common stock is 15.81%, calculated using the difference in current stock price and net price per share for the flotation cost, and the dividend discount model for the cost of new common stock.

Explanation:

Calculating Choi's Flotation Cost and Cost of New Common Stock

The percentage flotation cost of Choi Company's new stock is 90.28% and the cost of new common stock is 15.94%.

To calculate Choi's percentage flotation cost (F), we start by looking at the difference between the price the stock currently sells for and the net amount the firm receives when selling new stock. The current stock price is $36, and the firm can net $32.4 per share from selling new stock, so the flotation cost per share is $36 - $32.4 = $3.6 per share. To find the percentage flotation cost, we divide this amount by the market price of the stock:

F = Flotation cost per share / Current stock price = $3.6 / $36 = 0.10 or 10%

Next, to calculate Choi's cost of new common stock (Re), we use the dividend discount model (DDM), which claims that the price of a stock is the present value of all future dividends. The expected dividend, D1, is $3.18 and the growth rate, g, is 6%. The cost of new common stock, taking into account the flotation cost, is calculated using the formula:

Re = (D1 / Net price per share) + g = ($3.18 / $32.4) + 0.06 = 0.0981 + 0.06 = 0.1581 or 15.81%

if p= 1/3 what is the answer to 9p2=

Answers

The correct answer is 6

When p equals 1/3, 9p^2 calculates to 1 after squaring p and multiplying by 9.

The question involves calculating the expression 9p^2 given that p = 1/3. First, we square the value of 'p' and then multiply it by 9. Following the process, we have:

[tex](\frac{1}{3} )^2 = \frac{1}{9} \\9 \times (\frac{1}{9} ) = 1[/tex]

Therefore, 9p^2 is equal to 1 when p is equal to 1/3.

Joe paid $14.00 for a board game this is 70% of the original price what was the original price

Answers

start off by finding 10% of $14. in order to find 10%, divide it by 70 which gives 2. you now need to make the 30% to add to the 70%, by timesing the 2 by 3to give 6. now all you need to do it add the 6 to 14 to make 20!

so your answer is $20

Answer:

The original price was $20.00

Step-by-step explanation:

Joe paid $14.00 for a board game.

This is the 70% of the original price.

Let the original price of a board game be x

70% of x = $14.00

0.70x = 14.00

x = [tex]\frac{14}{0.7}[/tex] = $20.00

The original price was $20.00

A scout group is setting up a tent at camp. Because rain is predicted, the scouts decide to build a fly, or rain cover, over the tent. The fly will be 12 feet high and 16 feet wide. The scouts are building the frame for the fly with poles slanted to meet over the top of the tent. What is the minimum length of the poles needed to support the fly?

Answers

Most of the information's required for finding the answer is already given in the question. 
Height of the fly = 12 feet
Width of the fly = 16 feet
Now we can find the length of the poles using Pythagoras theorem.

Length of the poles = square root [(12)^2 + (8)^2]
                               = square root (144 + 64)
                               = square root (208)
                               = 14.4 feet

From the above deduction, we can conclude that the height of the poles needed to be 14.4 feet. I hope the answer has helped you.
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