1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anna [14]
3 years ago
13

Train A leaves New York for California at the same time Train B leaves California for New York. They are 2900 miles apart. They

both travel at an average speed of 120 mph. A. What is the velocity of train A? B. What is the velocity of train B? C. How long will it take before they meet? Show your work.
Mathematics
1 answer:
professor190 [17]3 years ago
7 0

Answer:

(A) 120 mph

(B) -120 mph

(C) 12 hours 5 minutes.

Step-by-step explanation:

Given that,

New York and California are 2900 miles apart,

Both the trains A as well as B travel at an average speed of 120 mph.

Assuming that the path between the starting point in New York and the ending point in California is straight, so the given distance of 2900 miles is actually the shortest distance which is the displacement between the source and destination.

So, the given speed on the straight path is actually the velocity.

Assuming that the velocity is positive in the direction from New York towards California.

(A) So, the velocity of train A (towards California)  = 120 mph.

(B) The velocity of train B (towards New York) = -120 mph.

(C) Bothy are moving towards each other, so the relative velocity between them is 120+120=240 mph, and the initial distance between them is 2900 miles.

When they meet, the displacement between them becomes zero, displacement covered= 2900-0=2900 miles.

So, the time, t, taken to cover the displacement 2900 miles with a relative velocity of 240 mph is

t=\frac{2900}{240} [as time= displacement / relative velocity]

\Rightarrow t=12\frac{1}{12} hours

=12 hours 5 minutes.

You might be interested in
Question 1 of 5
babunello [35]
It would be a rectangle
5 0
2 years ago
Pls help asap!! this is due really soon
s2008m [1.1K]

Answer:

EF=20

Step-by-step explanation:

EF is midsegment of the triangle so the equation is

AB/2=EF

7x-2/2=2x+8

7x-2=4x+16

7x-4x=16+2

3x=18

x=18/3

x=6

EF=2×6+8

=12+8

=20

6 0
2 years ago
Create a six sided cube that shows examples of different solids and explain how to calculate the surface area and volume of each
gulaghasi [49]
We are given a six-sided cube. To determine the surface area and the volume of the cube, we need to know the area of one side:

All sides of the cube are squares with side, s. The area of one square is

A = s^2 

The surface area of a cube is the sum of all areas of the sides. So

SA = 6 sides * s^2
SA = 6s^2

The volume of the cube is 

V = s^3

The volume of the cube represents the total solid area of the cube which includes the space inside the solid. 
7 0
3 years ago
Dilate the segment about the origin by a scale factor of 1 /2 What are the coordinates of B'? please help
Marina86 [1]

Answer:

(1,-2) edge2020

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Answer with solution
adelina 88 [10]
In general, the scalar multiple of k times u,<span> is this: 

</span>k\vec u = k(ux, uy)=(Kux,Kuy) 

So, here's how we find 3\vec v 

3\vec v = 3 * (2,4) = (3*2,3*4) &#10;&#10;= (6,12) 

The answer is <span><span>(6,12).</span></span>
6 0
2 years ago
Read 2 more answers
Other questions:
  • PLEASE HELP ME ITS ALREADY LATE AND ITS BRINGING MY GRADE WAY DOWN PLEASE HELP ME PLEASE!!!!
    8·1 answer
  • Write in exponent form and word form. 10x10x10x10x10x10
    15·2 answers
  • Which of the following graphs is a function ​
    7·2 answers
  • If 18 inches is equal to 1 1/2 feet how many feet long is a 36 inch board?
    6·1 answer
  • Plz help me with this!!!!!!
    13·1 answer
  • I need to solve for x btw these are corresponding angles ​
    9·1 answer
  • Write an equation that represents the line that passes through the points (– 2, – 3) and (−1, 2).
    10·1 answer
  • 2) Find the area. *<br> 7 points<br> 12 cm<br> 2 cm<br> 4 cm<br> 6 cm<br> 24<br> O 12<br> 36<br> 48
    15·1 answer
  • How many dollars does 3 bottles of water cost ?
    5·1 answer
  • First answer = brainliest
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!