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
Mashcka [7]
4 years ago
11

Annabelle is taking the Polar Express ALL the way to the North Pole! The Polar Express is 100 meters long and it takes 30 second

s to cross Santa’s 400m ice bridge. What speed is the train going at?
Mathematics
1 answer:
vlada-n [284]4 years ago
7 0

Hey!

Hope this helps...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~

To solve this, we will be doing a semi-alternate route, but it will get us to our answer...


400 / 100 = 4

30 / 4 = 7.5 seconds

60 * 60 * 7.5 = 27,000 meters per hour

<em></em><em>Lets plug it into our meters to miles formula...</em>

27,000 / 1,609.344 ~ 16.777 miles per hour


So...

The answer is:  The Polar Express was going 27,000 meters per hour (or roughly close to 16.777 miles per hour)...

You might be interested in
Write the equation of the line with a slope of 2 that passes through the points -2,-7 and 5,7
lubasha [3.4K]

Answer:

Therefore the equation of the line through ( -2 , -7 ) and ( 5 , 7 ) is

2x - y = 3

Step-by-step explanation:

Given:

Slope = 2 = m ( say )

Let,

point A( x₁ , y₁) ≡ ( -2 , -7 )

point B( x₂ , y₂) ≡ ( 5 , 7 )

To Find:

Equation of Line AB =?

Solution:

Equation of a line passing through Two points A( x₁ , y₁) and B( x₂ , y₂)is given by the formula,

(y - y_{1} )=(\frac{y_{2}-y_{1} }{x_{2}-x_{1} })\times(x-x_{1}) \\

Or

Equation of a line passing through a points A( x₁ , y₁) and i having slope m is given by the formula,

(y - y_{1} )=m\times(x-x_{1}) \\

Substituting the given values in a above equation we get

(y-(-7))=2\times (x-(-2))\\ \\(y+7)=2(x+2)\\\\(y+7)=2x+4\\2x-y=3\\2x-y=3...............\textrm{which is the required equation of the line AB}

Therefore the equation of the line through ( -2 , -7 ) and ( 5 , 7 ) is

2x - y = 3

8 0
3 years ago
28 students travel on a field trip. They bring a van that can seat 12 students. Elena and Kiran's teacher asks other adults to d
Valentin [98]

Answer:

Step-by-step explanation:

Yes, she can use this inequality and it does matter since the number of cars that the inequality provides will need to be equal to or more than that number in order for all the students to be able to go. Therefore, if we apply the inequality it would give us the minimum number of cars needed (n) like so

12  + 3n > 28   ... subtract 12 on both sides  

3n > 16  ... divide both sides by 3

n > 5 1/3

Since there can't be 1/3 of a car and the number of cars needed must be higher than 5 1/3 then we would need a total of 6 cars to take all of the children.

5 0
3 years ago
The line with gradient-4 which cuts the y axis at -2​
Helen [10]

Answer:

• Considering the general equation of a line

y = mx + b

m is the gradient and b is the y-intercept.

Substitute:

{ \underline{ \underline{ \:  \: y =  - 4x - 2 \:  \: }}}

8 0
3 years ago
Help I need help on this question
Natali [406]

Answer:

56.4 degrees

Step-by-step explanation:

90 degrees - 33.6 degrees = 56.4 degrees

3 0
3 years ago
Read 2 more answers
What is the value of(3)^3 <br> 10
torisob [31]
If the 10 is being multiplied it’s 90
4 0
3 years ago
Other questions:
  • A recipe that yields two loaves of bread requires 2 1/2 cups of flour. Edgar has a bag that contains 18 3/4 cup of flour. How ma
    8·1 answer
  • Write 5x - 15y = -8 in slope-intercept form
    10·2 answers
  • Construct an equation that has n = 6 as its solution. Use n on both sides of the equation.
    10·1 answer
  • { 44-[28+(8+5)]} 2.​
    13·2 answers
  • IS ANYONE GOOD IN LAW OF COSINES..If so ill give brainlest​
    6·1 answer
  • PLS HELP ME I HAVE A FEW MINS TO ANSWER I'LL DO WHAT EVER YOU WANT JUST HELP ME
    13·1 answer
  • Sean has 9 liters of juice. He pours equal amounts of the juice into 4 pitchers. There is 0.5 of a liter of juice left. How many
    9·1 answer
  • Identify the correct statement for the given figure.
    13·1 answer
  • If x + 3/4 =1, then which point on the number line could be x ?
    13·2 answers
  • Factor completely.<br> 3x^2 – 36x + 60
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!