( 50 points ) A train travels at an average speed of 80 km/h. How long will it take the train to travel 320 km?

Answers

Answer 1

Answer:

4 hours

Explanation:

[tex]\sf time = \dfrac{distance}{speed}[/tex]

Here the units are same for both, so no need of conversion.

Solve:

time taken = distance/speed

time taken = 320/80

time taken = 4 hours

Answer 2

Answer:

4 hours

Step-by-step explanation:

[tex]\text{Speed} =\frac{\text{distance} }{\text{time} }[/tex]

Then

[tex]\text{time} =\frac{\text{distance} }{\text{speed} }[/tex]

Then

[tex]\text{time} =\frac{\text{320} }{\text{80} } =4[/tex]


Related Questions

i need some help with this!! i want my grade to go up :)

Answers

Answer:

C

Step-by-step explanation:

there is a small possibility that it may be C I am not even close to being sure that this is the answer and I am so sorry if this is wrong

The answer is C I took the test on canvas

I need help with this question! (20 POINTS)

Answers

Answer:

A (1,5) (1,8) (4,8) (4,5) = Square

B (2,5) (2,8) (4,8) (4,5) = Rectangle

C (2,3) (4,6) (8,6) (10,3) = Trapezoid

D (2,1) (2,5) (6,5) (6,1) = Square

Step-by-step explanation:

Just enter the coordinates into Desmos graphing calculator.

What is the area of the triangle?

Answers

keep in mind that the height or altitude of a triangle is the perpendicular distance from its base to the top.  Check the picture below.

Answer:

multiply all of the numbers then divide by 0.5

Step-by-step explanation:

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
Use the table to answer the following questions.
Time (hours) Distance (miles)
2 90
3 135
5 225
6 270
1. Find the constant of proportionality.

2. Use the constant of proportionality to write a unit rate for the data in the table.

3. Write an equation to represent the relationship between time, t, and distance, d.

Can you please do step by step showing us how you got the answers?

Answers

Answer:

1. Time (hours): 1     Distance (miles): 45

2. 1;45

  2;90

  3;135

  4;180

  5;225

  6;270

3. (c= constant of proportionality)

c= [tex]\frac{distance}{time}[/tex]

c=[tex]\frac{90 miles}{2 hours}[/tex]

c= 45 miles per hour

Step-by-step explanation:

So you may see for each hour they are going 45 miles by dividing 2 by 2 and 90 by 2, so there constant of proportionality is 45 miles per hour. (answer 3 is the step by step)

Answers:
___ sold ___ more rings than ___
Jacob 5 lou
lou 8 jacob
20
15

Answers

Answer:

Lou sold 5 more earings than Jacob

Step-by-step explanation:

Step 1

Find 20% of 200

For fraction: divide 20 by 100 and remove the % sign.

[tex]{20}\%=\frac{20}{100}[/tex]

For decimal: move the decimal point 2 places to the left and remove the % sign.

[tex]{20}\%=0.2[/tex]

Multiply the decimal or fraction by the quantity that equals 100%

[tex]100[/tex]%[tex]=200[/tex]

[tex]\frac{20}{100} *200=0.2*200=40[/tex]

20% of 200 is 40

Lou sold 40 rings

Step 2

Find how much more or less earings did Lou sell than Jacob

40-35=5

So Lou sold 5 more rings than Jacob

Final Answer:Lou sold 5 more earings than Jacob

Using a Graphing Utility to Find Polar CoordiNtes CoordiNtes In Exercises 61-70, use a graphing utility to find one set of polar coordiNtes of the point given in rectangular coordiNtes.
66. (5,-\sqrt{2})

Answers

Awnser is (r,0)=(2,8,0.49)

(5/2, 4/3)

PLEAS HELP ME OUT!!!!!

Answers

17 is your answer

Because different between the x and 13 is equal to the 9 and 13 as shown in diagram

we can write equation

13-9 = x-13

4=x-13

x= 13+4 = 17 Ans

17 is your answer! Hope this helps

Pls help me I dont understand giving brainliest if correct

Answers

Answer:6

Step-by-step explanation:

Heron's Formula is: area = sqrt(s(s-a)(s-b)(s-c)) and s is the semiperimeter

Putting the side lengths in would be:

s = (a + b + c)/2

area = sqrt(6(6-5)(6-4)(6-3)) = sqrt(6*1*2*3) = 3*sqrt(2)

So the answer is 3*sqrt(2) which is equal to 6

Answer:

  6 units²

Step-by-step explanation:

You want the area of the 3-4-5 right triangle.

Area

The area formula for a triangle is ...

  A = 1/2bh

where b represents the "base" and h represents the "height". The height is always measured to the vertex opposite the base, in direction perpendicular to the base.

Right triangle

The perpendicular legs of a right triangle have the necessary relationship for either one to be considered the "base", and the other to be the "height."

Here, that means we can call the side of length 3 units the "base" and the side of length 4 units the "height", or vice versa.

This means the area is ...

  A = 1/2(3 units)(4 units) = 6 units²

__

Additional comment

Heron's formula for the area of a triangle based on all three side lengths can be used for this, but is more work than necessary.

<95141404393>

A. Simplify: -12/2 =
2. -8/ -2 =
3. ( -3)(2)(-4) =
4. (4)(-3)(-6)(2)=
5. (1/2)(-6)(1/4)(-8) =
B. On your Own
a. Make 10 multiplication of integers with 3 terms each
b. Make 20 divisions of integers.
C. Use a calculator

Answers

#1- -6
#2- -4
#3- 24
#4- 144
#5- 6
Don’t know the rest sorry
-6
-4
24
144
6

I only have time for those ): I hope this helps you pass!

Select all the values below that you can find or calculate when given only a dot plot

1.) mean

2.) median

3.) range

4.) IQR

5.) outliers

Answers

1,2,3,5 because you can’t find the IQR until you have a box and whisker plot
1, 2, 3, 5! You can’t find the IQR til you have a box and whisker plot!


Hope it helps

( Brainliest, 50 points. SERIOUS ANSWERS ONLY ) Help me with this question!

Answers

It’s simple. See how many units there are for the shapes and scale it up or down. ex. if you had 5, 10, 15: then you could double and draw a shape with 10, 20, 30.

Help please this is due today!!!!!!!!!!!!!!!!! I would give it a 5 star and thanks for it.

The office building where Ryan works is made up of two cube-shaped pieces. At lunchtime, Ryan and his other office workers walk around the edge of the building for exercise. If the volume of the larger part is 65,000 m³and the volume of the smaller part is 4000 m³, what is the distance around the edge of the building?

Answers

Answer:

At lunchtime, Ryan and his other office workers walk around the edge of the building for exercise. If the volume of the larger part is 65,000 m³and the ...

Step-by-step explanation:

Answer this RIGHHT and you'll get Brainliest

Answers

Answer:

Circle is closed and Graph shaded to the left

Step-by-step explanation:

look at an model of a number line.

Hope this helps :)))))

Graph shaded to the left of the circle

Sort the cards with there identical matches.

Answers

Answer:

A, C, E, L and G, H, B, D

Step-by-step explanation:

Which of the following numbers is prime?

12
15
7
6

Answers

Answer:

7

Step-by-step explanation:

A prime number is a number which has no factors other than itself and 1. In other words, this number can only be divided by itself and 1 and result in a whole number answer. All of the other choices can be divided by some other numbers and result in a whole number answer.

Factors of 12:

1, 2, 3, 4, 6, 12

Facotrs of 15:

1, 3, 5, 15

Facotrs of 7:

1, 7

Factors of 6:

1, 2, 3, 6

Answer:

The number (7) is a prime number.

What are prime and composite numbers?Prime numbers are such numbers that should have two factors, one and the number itself. An example of a prime number could be "2".

Factors of 2: 1 and 2 (Verifies the above definition)

Composite numbers are such numbers that have more than two factors. An example of a composite number could be 4.

Factors of 4: 1, 2 and 4 (Verifies the above definition)

Option A

Given number: 12

Let's list the factors of this number.

⇒ Factors of 12:  1, 2, 3, 4, 6, 12

The number provided is not a prime number because the number has more than two factors. Therefore, Option A is not correct.

Option B

Given number: 15

Let's list the factors of this number.

⇒ Factors of 15:  1, 3, 5, 15

The number provided is not a prime number because the number has more than two factors. Therefore, Option B is not correct.

Option C

Given number: 7

Let's list the factors of this number.

⇒ Factors of 7:  1 and 7

The number provided is a prime number because the number has exactly two factors. Therefore, Option C is correct.

Option D

Given number: 6

Let's list the factors of this number.

⇒ Factors of 6:  1, 2, 3, and 6

The number provided is not a prime number because the number has more than two factors. Therefore, Option D is not correct.

[tex]\overline{================================================}[/tex]

Learn more about Prime and Composite numbers:

https://brainly.com/question/123961 https://brainly.com/question/559568

What is the surface area of the rectangular solid below?

Answers

Answer:

c, I believe. I'm not 100% sure.

2(14x8+14x10+8x10)=
664inches squared

Write and solve a proportion to answer the question. (Skills Review Handbook) 22. 30 is 15% of what number?

Answers

Answer:

The answer is 148.6666667

Step-by-step explanation:

1) Set a linear quation

[tex] \frac{22.30}{x} = \frac{15}{100} [/tex]

2) Cross multiply

[tex]15x = 22.30 \times 100[/tex]

3) Multiple the right side

[tex]15x = 2230[/tex]

4) Divide both side by 15

[tex] \frac{15x}{15} = \frac{2230}{15} [/tex]

5) Solve the linear equation

[tex]x = 148.6666667[/tex]

True or False, the below is a right triangle: a = 5, b = 12, c =13

Answers

Answer: True

Explanation: Using a^2 + b^2 = c^2 method.

5^2 + 12^2 = 169.
13^2 = 169.

169 = 169.

Hope this helps.
Answer: True

Explication:

PLEASE HELP

Find the value of x

Answers

Answer:

33°.

Step-by-step explanation:

We know that:

Angles A and B are 69° and 78°.These angles and angle C add up to 180°.

We don't know:

Angle C.

So, lets solve 180 - 78 - 69:

180 - 78 - 69= (180 - 78) - 69= 102 - 69= 33.Angle C is 33°.
All angles in a Circle add up to be 180

180-69-78=33

Brainliest! Help please, thank you!!!

Answers

Answer: 24

Step-by-step explanation:

12x2= 24

8x3=24

Answer:

24

8 × 3 = 2412 × 2 = 24

Notice a pattern, the products are both 24. This means that 8 and 12 share an LCD of 24.

Point J (3, -7) is dilated from the origin by a scale factor of 2. What are the coordinates of J'?

Please please help I need to get my work done ASAP!!

Answers

To figure out the figure by a scale factor of 2, you multiply both the x and y value by 2.

3 x 2 = 6
-7 x 2 = -14

So, the coordinates of J are (6,-14)
Hope this helped! :)

Please Help
A sports writer the number of games each baseball team ronin the past 30 years. She wants to know how many teams won exactly 100 games

Answers

Answer: A

Step-by-step explanation:

A ((hope this is helpful)

13. Ten people wish to play in a basketball game. In how many different ways can two teams of five players each be formed?

Answers

100 different ways bc there is 10 people and 5 per team so 5 different spots per team and there are 2 teams so multiply that and get 10 then 10x10=100

What is true about all points on the y-axis? All have an x-coordinate of 0. All have a y-coordinate of 0. All have the ordered pair (0, 0). All are directly above or below the origin. All are directly to the right or left of the origi

Answers

Answer:

All have an X coordinate of 0

Step-by-step explanation:

Because if a point is to be on the Y axis than it would have to not move on the x axis. Therefore the value of the X coordinate must be zero for a point to be on the Y axis. Please rate brainliest.

Answer:

it’s A and D I hope you get 100 :D

Step-by-step explanation:

coolhedgehog200 was wrong about their answer is actually All have an x-coordinate of 0, and All are directly above or below the origin. So I picked one it was wrong until I got it right myself because it was wrong so A and D are correct for those who need it in the future my names Mimi anyway byee.

Hope this helps!!

HAVE AN AMAZING DAY

Please help me with this I would give you 50 points.

Answers

Answer:

#1, x=57
#2, r=223
#3, h=17
#4, g=48

Step-by-step explanation:

Integral Calculus Problem:
[tex]\int\limits^1_4 {\frac{cosx}{1+e^1/x} } \, dx[/tex] = _

- Do not spam
- Do not copy and paste
- Do not add any unnecessary information
- Any of these will result in a report
- Please help, thank you

Answers

Answer:

[tex]\displaystyle \int\limits^1_4 {\frac{\cos x}{1 + \frac{e}{x}}} \, dx \approx \boxed{0.862854}[/tex]

General Formulas and Concepts:

Calculus

Differentiation

DerivativesDerivative Notation

Derivative Property [Addition/Subtraction]:
[tex]\displaystyle (u + v)' = u' + v'[/tex]

Derivative Rule [Basic Power Rule]:

f(x) = cxⁿf’(x) = c·nxⁿ⁻¹

Integration

Integrals

Integration Rule [Fundamental Theorem of Calculus 1]:
[tex]\displaystyle \int\limits^b_a {f(x)} \, dx = F(b) - F(a)[/tex]

Integration Property [Multiplied Constant]:
[tex]\displaystyle \int {cf(x)} \, dx = c \int {f(x)} \, dx[/tex]

Integration Property [Addition/Subtraction]:
[tex]\displaystyle \int {[f(x) \pm g(x)]} \, dx = \int {f(x)} \, dx \pm \int {g(x)} \, dx[/tex]

Integration Methods: U-Substitution and U-Solve

Special Integrals:

Sine Integral:
[tex]\displaystyle \int {\frac{\sin x}{x}} \, dx = \text{Si} (u) + C[/tex]Cosine Integral:
[tex]\displaystyle \int {\frac{\cos x}{x}} \, dx = \text{Ci} (u) + C[/tex]

Step-by-step explanation:

*Note:
The problem is too big to fit all work. I will assume that you know how to do basic calculus.

Step 1: Define

Identify given.

[tex]\displaystyle \int\limits^1_4 {\frac{\cos x}{1 + \frac{e}{x}}} \, dx[/tex]

Step 2: Integrate Pt. 1

[Integrand] Rewrite:
[tex]\displaystyle \begin{aligned}\int\limits^1_4 {\frac{\cos x}{1 + \frac{e}{x}}} \, dx & = \int\limits^1_4 {\frac{x \cos x}{x + e} \, dx \leftarrow \\\end{aligned}[/tex]

Step 3: Integrate Pt. 2

Identify variables for u-substitution.

Set u:
[tex]\displaystyle u = x + e[/tex][u] Differentiate [Derivative Rules and Properties]:
[tex]\displaystyle du = dx[/tex]

Step 4: Integrate Pt. 3

[Integral] Apply Integration Method [U-Substitution]:
[tex]\displaystyle \begin{aligned}\int\limits^1_4 {\frac{\cos x}{1 + \frac{e}{x}}} \, dx & = \int\limits^1_4 {\frac{x \cos x}{x + e} \, dx \\& = \int\limits^{x = 1}_{x = 4} {\frac{(u - e) \cos (u - e)}{u} \, du \leftarrow \\\end{aligned}[/tex][Integral] Rewrite [Integration Property - Addition/Subtraction]:
[tex]\displaystyle \begin{aligned}\int\limits^1_4 {\frac{\cos x}{1 + \frac{e}{x}}} \, dx & = \int\limits^1_4 {\frac{x \cos x}{x + e} \, dx \\& = \int\limits^{x = 1}_{x = 4} {\frac{(u - e) \cos (u - e)}{u} \, du \\ & = \int\limits^{x = 1}_{x = 4} {\cos ( u - e)} \, du - \int\limits^{x = 1}_{x = 4} {\frac{e \cos (u - e)}{u}} \, du \leftarrow \\\end{aligned}[/tex][2nd Integral] Rewrite [Integration Property - Multiplied Constant]:
[tex]\displaystyle \begin{aligned}\int\limits^1_4 {\frac{\cos x}{1 + \frac{e}{x}}} \, dx & = \int\limits^{x = 1}_{x = 4} {\cos ( u - e)} \, du - e \int\limits^{x = 1}_{x = 4} {\frac{\cos (u - e)}{u}} \, du \leftarrow \\\end{aligned}[/tex]

Step 5: Integrate Pt. 4

Identify variables for u-substitution for the 1st integral.

Use another variable besides u to avoid confusion with earlier substitutions.

Set v:
[tex]\displaystyle v = u - e[/tex][v] Differentiate:
[tex]\displaystyle dv = du[/tex]

Step 6: Integrate Pt. 5

Solve the 1st integral using basic integration techniques listed under "Calculus":
[tex]\displaystyle \begin{aligned}\int\limits^{x = 1}_{x = 4} {\cos (u - e)} \, du & = \int\limits^{x = 1}_{x = 4} {\cos v} \, dv \\& = \sin v \bigg| \limits^{x = 1}_{x = 4} \\& = \sin (u - e) \bigg| \limits^{x = 1}_{x = 4} \\& = \sin (x) \bigg| \limits^{x = 1}_{x = 4} \\& = \sin 1 - \sin 4\end{aligned}[/tex]

Step 7: Integrate Pt. 6

To solve the 2nd integral, we use the same methods as "Step 6":

[tex]\displaystyle\begin{aligned}\int\limits^{x = 1}_{x = 4} {\frac{\cos (u - e)}{u}} \, du & = \int\limits^{x = 1}_{x = 4} {\frac{\sin e \sin u + \cos e \cos u}{u}} \, du \\& = \sin e \int\limits^{x = 1}_{x = 4} {\frac{\sin u}{u}} \, du + \cos e \int\limits^{x = 1}_{x = 4} {\frac{\cos u}{u}} \, du \\& = \sin (e) \text{Si} (u) \bigg| \limits^{x = 1}_{x = 4} + \cos (e) \text{Ci} (u) \bigg| \limits^{x = 1}_{x = 4} \\\end{aligned}[/tex]

[tex]\displaystyle\begin{aligned}\int\limits^{x = 1}_{x = 4} {\frac{\cos (u - e)}{u}} \, du & = \sin (e) \text{Si} (x + e) \bigg| \limits^{x = 1}_{x = 4} + \cos (e) \text{Ci} (x + e) \bigg| \limits^{x = 1}_{x = 4} \\& = \bigg[ \sin (e) \text{Si} (1 + e) - \sin (e) \text{Si} (4 + e) \bigg] + \bigg[ \cos (e) \text{Ci} (1 + e) - \cos (e) \text{Ci} (4 + e) \bigg] \\\end{aligned}[/tex]

Step 8: Integrate Pt. 7

Combine our 2 integral values to obtain a final answer:

[tex]\displaystyle \int\limits^1_4 {\frac{\cos x}{1 + \frac{e}{x}}} \, dx & = \int\limits^{x = 1}_{x = 4} {\cos ( u - e)} \, du - e \int\limits^{x = 1}_{x = 4} {\frac{\cos (u - e)}{u}} \, du \\\begin{aligned}& = \sin 1 - \sin 4 - e \bigg[ \sin (e) \text{Si} (1 + e) - \sin (e) \text{Si} (4 + e) + \cos (e) \text{Ci} (1 + e) - \cos (e) \text{Ci} (4 + e) \bigg] \\& \approx \boxed{0862854} \\\end{aligned}[/tex]

∴ we have evaluated the given special definite integral.

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Learn more about integration: https://brainly.com/question/27746472

Learn more about Calculus: https://brainly.com/question/27746481

---

Topic: Calculus

answer: .862854 i believe

ONLY NEED HELP ON PART B!!

Answers

I think it’s 12

The area of a trapezoid is (a+b) / 2 x h

4 + 8 / 2 = 6
6 x h(2) = 12

Answer:

Step-by-step explanation:

Remark

You need the information from Part A (which is correct). Then you can do Part B.

Givens

shorter base = 4

height = 2

Longer base (b) = 8

Equation

Area = (Shorter Base  + Longer Base) * h / 2            Substitute values. Solve

Solution

Area = (4 + 8)*2/2

Area = 12

Can you help with this question please

Answers

Answer: the answer is 175.84

Step-by-step explanation: TSA of cylinder= pir( r + h)

= 3.14 x 4 x ( 4 + 10 )      {here diameter is 8 so radius is it's half}

= 3.14 x 4 x 14

= 175.84

Answer:

by using the formula of 2×22/7×r (r+h)

Convert 0.ModifyingAbove 393 with bar into a fraction. 1. Assign a decimal to a variable: x = 0.ModifyingAbove 393 with bar. 2. It has 3 repeating digits. Multiply by 10 Superscript 3: (1000) x = 0.ModifyingAbove 393 with bar (1000). 1000 x = 393.ModifyingAbove 393 with bar. minus (x = 0.Modifyingabove 393 with bar). 999 x = 393. 1. Solve for x: x = question mark. Solve for the value of x: What is x = 0.ModifyingAbove 393 with bar as a fraction?


x =

ANSWER; x = 131/333

Answers

Answer:

[tex]x=\dfrac{131}{333}[/tex]

Step-by-step explanation:

Assign the decimal to a variable:

Let  [tex]x=0.\overline{393}[/tex]

Multiply both sides by 1000:

[tex]\implies x \cdot 1000=0.\overline{393} \cdot 1000[/tex]

[tex]\implies 1000x=393.\overline{393}[/tex]

Subtract the first equation from the second to eliminate the part after the decimal:

[tex]\begin{array}{r r c r}& 1000x & = & 393.\overline{393} \\\\- & x & = & 0.\overline{393} \\\\\cline{2-4} \\& 999x & = & 393 \\\end{array}[/tex]

Divide both sides by 999:

[tex]\implies \dfrac{999x}{999}=\dfrac{393}{999}[/tex]

[tex]\implies x=\dfrac{393}{999}[/tex]

Reduce the fraction:

[tex]\implies x=\dfrac{393 \div 3}{999 \div 3}[/tex]

[tex]\implies x=\dfrac{131}{333}[/tex]

131/333 ………….zzzssssss

Which represents a measure of volume?
5 cm³
5 square cm
5 cm
5 cm²

Answers

5 cm3, since cubed is used when something is 3-dimensional
5 cm^3 since it’s cubed !
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