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
tatiyna
3 years ago
15

A red light blinks every 12 seconds and a blue light blinks every 9 seconds. When will both lights blink at the same time?

Mathematics
1 answer:
mote1985 [20]3 years ago
3 0

Answer:

36

Step-by-step explanation:

We need to find the LCM of the two numbers because we need to know the lowest number that 12 and 9 are both in.

12 × 1 = 12

12 × 2 = 24

12 × 3 = 36

12 × 4 = 48

9 × 1 = 9

9 × 2 = 18

9 × 3 = 27

9 × 4 = 36

We can see that 36 is the lowest number that occurs both in 12 and 9 so the blue and red light will both link at 36 seconds

You might be interested in
If a=7 and b+c=67, find a²+ab+ac
Stels [109]

Hope this will help..........

6 0
2 years ago
Read 2 more answers
I need help please.
vampirchik [111]

Answer:

Step-by-step explanation: Do 9 times 9 times 9 then subtract 52 from it you will get 531,389 :> happy to help!

3 0
3 years ago
NO LINKS!! Please help me with this problem​
Fittoniya [83]

Answer:

  • Mix A is 2 units
  • Mix B is 1 unit
  • Mix C is 3 units

Step-by-step explanation:

Let amount of Mix A is a, Mix B is b, Mix C is c.

<u>With the given details, we get the following system</u>

  • 5a + 6b + 4c = 28
  • 4a + 2b + c = 13
  • 3a + 4b + 4c = 22

Find the value of c (the easiest one) for substitution

  • c = 13 - 4a - b

Substitute c into the first equation

  • 5a + 6b + 4(13 - 4a - 2b) = 28
  • 5a + 6b + 52 - 16a - 8b = 28
  • - 11a - 2b = 28 - 52
  • 11a + 2b = 24      (5)

Substitute c into the third equation

  • 3a + 4b + 4(13 - 4a - 2b) = 22
  • 3a + 4b + 52 - 16a - 8b = 22
  • - 13a - 4b = 22 - 52
  • 13a + 4b = 30       (6)

Double the equation (5) and subtract (6), find the value of a

  • 2(11a + 2b) - 13a - 4b = 2(24) - 30
  • 22a - 13a = 48 - 30
  • 9a = 18
  • a = 2

Find b

  • 11*2 + 2b = 24
  • 22 + 2b = 24
  • 2b = 2
  • b = 1

Now find c

  • c = 13 - 4*2 - 2*1
  • c = 13 - 8 - 2
  • c = 3
6 0
2 years ago
One dozen eggs were purchased for $.89 how much do 4 eggs cost?
EastWind [94]
I believe the answer is 29.67 (if I calculated correctly). However, it can easily round to $.30
3 0
3 years ago
Read 2 more answers
Free points for anyone if they can say what x-3=53+17
joja [24]
The answer is x=73.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Liz is a student in Ms. Xu's class. Liz says to her classmates, "Of all the pairs of students Ms. Xu can choose as class leaders
    15·1 answer
  • 5.5 divided by 83 in quotient
    15·1 answer
  • What is the slope of these points (-14, -2) ,(7,7)
    13·1 answer
  • Really need help. Answer following questions
    12·1 answer
  • Can someone help plz!
    15·1 answer
  • Find the x-intercept and y-intercept of the line. 3x-6y=12
    11·1 answer
  • A parachute speed during a free fall reaches117 miles per hour What is the speed in feet per second At the speed how many feet w
    6·1 answer
  • What is the value of the underlined digit? 35,028 (3 is underlined)
    9·1 answer
  • Help me please……………….
    10·1 answer
  • The equation h(t) = –16t2 + 64t + 80 models the height of a rocket launched from the top of a building. Which statement is true?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!