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
alekssr [168]
3 years ago
13

Ardi and Lei are both travelling by train.

Mathematics
1 answer:
lianna [129]3 years ago
4 0

Answer:

10 kilometer/hour

Step-by-step explanation:

Average speed = Total distance travelled / Total time taken

Ardi:

Total distance travelled = 70 km

Total time taken = 35 minutes = 35/60 hour

Average speed = Total distance travelled / Total time taken

= 70 km ÷ 35/60 hr

= 70 × 60/35

= 4,200/35

= 120 kilometer/hour

Lei:

Total distance travelled = 585 km Total time taken = 9:05 - 13:35 = 4 hours 30 minutes

= 4.5 hours

Average speed = Total distance travelled / Total time taken

= 585 km / 4.5 hours

= 130 kilometer/hour

Difference, in km/h, between the average speed of their trains = Lei's train - Ardi's train

= 130 kilometer/hour - 120 kilometer/hour

= 10 kilometer/hour

You might be interested in
Find the measure of angle x in the figure.<br>and plz EXPLAIN<br><br>95<br>55<br>30<br>85​
nlexa [21]

Answer:

85 im pretty sure..

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Ethan put $150 into a CD that pays 3% interest, compounded monthly. According to the rule of 72, approximately how long will it
SSSSS [86.1K]
Hi there

The rule of 72 is
72/rate=time
72÷3=24 years

Hope it helps
7 0
3 years ago
Read 2 more answers
How do I write an algebraic equation for this word problem?
Doss [256]
Hi.

Please note that I haven't done much algebra.

4 more = 4 +

Twice as many than the runner up means 2 times the amount they ate (a variable) = 2n

So far we have 4 + 2n

Since it's an equation, we are going to know what it equals. In the problem, we find out that it's 11. So the equation looks like this:

4 + 2n = 11

If this didn't work out, please let me know.

~

I believe n = 3.5
7 0
3 years ago
What is the difference between a hexagon and an octagon
ki77a [65]
 a hexagon has 6 sides An octagon has 8 sides.

Hope i helped <3
5 0
3 years ago
Read 2 more answers
Perform the indicated operation. Simplify the result in factored form. ((x - y)/ (x^2 - 1)) * ((x - 1)/(x^2 - y^2))
Scilla [17]

Answer:

The answer to your question is            \frac{1}{(x + 1)(x + y)}            

Step-by-step explanation:

Real operation

                      \frac{x - y}{x^{2} - 1} \frac{x - 1}{x^{2} - y^{2}}

Process

1.- Factor the denominators

                     \frac{x - y}{(x + 1)(x - 1)} \frac{x - 1}{(x + y)(x - y)}

2.- Simplify like terms

Cancel (x - y) and (x - 1) because they are in numerator and the denominator

                    \frac{1}{(x + 1)(x + y)}            This is the answer or you can expand

3.- Expand

                   \frac{1}{x^{2} + xy + x + y^{2}}                    

3 0
3 years ago
Other questions:
  • There are 6 circles and 9 squares. What is the simplest ratio of circles to squares?
    13·2 answers
  • 0.285714 to a fraction
    8·1 answer
  • How many solutions are there to the functions? f(x)=3x+7
    13·1 answer
  • Why is the adjusted average used in math?
    11·1 answer
  • A committee raised 7/9 of their target goal last year and another 1/9 of the goal this year. What fraction of their goal has bee
    6·2 answers
  • Y=-3+1/2x graph the system of equations and write the solution
    9·1 answer
  • Company A charges $3.25 per spirit banner. The equation C=2.45x represents the cost in dollars, C, for x spirit banners at Compa
    5·1 answer
  • Now convert 1/5 to a decimal number by completing the long division. Remember to add 0s to the dividend as you work. Divide thro
    12·2 answers
  • Electric current flowing through wire produces heat that varies jointly as the resistance of the wire and the square of the curr
    11·1 answer
  • Please Help I'll mark brainliest thanks
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!