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
irinina [24]
3 years ago
12

Abdi has two electric train sets: A and B. Each train is on its own circular track. He starts both trains at the same time. Trai

n A returns to its starting point every 12 seconds. Train B returns to its starting point every 9 seconds. If the trains continue traveling what is the least amount of time in seconds that both trains will arrive at the starting points at the same time?
Mathematics
2 answers:
Fiesta28 [93]3 years ago
4 0

Answer:

<h2>After 36 seconds.</h2>

Step-by-step explanation:

To find the answer to this problem, we have to sum each period of time for each train, and see where they use the same time. Train A will return each 12 seconds and Train B will return each 9 seconds, this means that we have to build two sequences with this increasing numbers.

A       B

12      9

24     18

36     27

48     36

As you can observe in the sequences, after 36 seconds both trains will arrive at the starting points at the same time. To reach such time equivalence, the train A has to make three laps, and train B hast to make 6 laps.

Therefore, the answer is "after 30 seconds".

mrs_skeptik [129]3 years ago
3 0

Answer: 36 seconds

Step-by-step explanation:

A: 9, 18, 27, 36

B: 12, 24, 36

You might be interested in
What is the decimal equivalent for 139%
laiz [17]

Answer: 1.39

Step-by-step explanation:

Hope it helps! Mark me brainliest.

7 0
2 years ago
compounds are pure substances. What other substances are considered pure substances? A: chemical reactions B: elements C: mixtur
saul85 [17]

Answer:

Step-by-step explanation:

B

8 0
2 years ago
A wire 7 4/5 feet long is to be cut in three equal parts. How long should each Part be?
musickatia [10]

Answer:

See attachment

Step-by-step explanation:

7 0
2 years ago
Sin(-x) = -sin x for all values of x true or false?<br> I
marissa [1.9K]
<span>Sin(-x) = -sin x for all values of x, IT IS TRUE
Because sinx is an odd function</span>
5 0
2 years ago
In the diagram below PQR are point on the circle with centre o and diameter 14cm &lt;PRQ=35° Find the length of the minor arc PQ
Gekata [30.6K]

Answer:

Step-by-step explanation:

I'll draw a quick sketch. It's hard to "see" this kinda of problem w/o a drawing , so start there.   just draw as much as you can from what the problem tells you.

diameter = 14 cm

radius = 7 cm

pi = 3.142

PRQ = 35 °

to find Y use law of sines

sin(70) / Y = sin(55) / 7

sin(70) / sin(55) / 7 = Y  ( I'll use my calculator for all the non standard angles )

sin(70) * 7 / sin(55) = Y   ( and invert and multiply the fraction in the denom )

8.03007 = Y

x = 70 °

if you have questions, and  you should, just put them in the comments , I'll see them later :)

5 0
2 years ago
Other questions:
  • an NFL team kicker misses 2 out of every 11 field goals if he missed 8 filed goals throughout the season how many did he attempt
    9·2 answers
  • Mrs. Hanson has 2 pies for a party. She calculates that if she splits the pies evenly among the guests, they will each receive 1
    7·2 answers
  • Please solve this question:)
    7·1 answer
  • A building casts a shadow that is 420 meters long. At the same time, a person who is 2 meters tall casts a shadow that is 24 met
    8·2 answers
  • How do we get the area ?
    8·2 answers
  • Solve x^3=1/8<br> a.1/2<br> b.+1/2<br> c.1/4<br> d.+1/4
    13·1 answer
  • Josh borrowed $50,000 from the bank to buy a new truck. The bank is going to charge him an interest rate of 6.9%. If his loan la
    5·1 answer
  • An item is regularly priced at $65. Laura bought it at a discount of 15% off the regular price. How much did Laura pay?
    9·1 answer
  • Twain's decision to end "The War Prayer" with the townspeople ignoring what
    8·1 answer
  • 25 is 55% of what number
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!