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julia-pushkina [17]
3 years ago
13

Two neon lights are turned on at the same time one blinks every 5 seconds and the other blinks every 8 seconds when will both bl

ink at the same time
Mathematics
2 answers:
Natasha2012 [34]3 years ago
6 0

Answer: 40 seconds


Step-by-step explanation:

They have that multiple in common


s344n2d4d5 [400]3 years ago
5 0

Just find the lowest common multiple of 5 and 8.

So:

LCM [5, 8] = 40

At 40 seconds, both lights will blink at the same time.

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There are 14 rows of seats in a cinema.
xeze [42]

Answer:

24 tickets were not sold

Step-by-step explanation:

Here, we want to get the number of unsold tickets

In each row, there are 15 seats

In the Cinema, there are 14 rows

The total number of seats is thus;

15 * 14 = 220 seats

If all the 220 seats were booked, the total amount of ticket sales would have been;

220 * 6.5 = £1430

But in this case, the amount generated is £1,274

Hence, the difference in these amounts will be;

1430 - 1274 = £156

To get the number of tickets unsold, we have to divide the amount here by the price per unit ticket

Mathematically, we have this as;

£156/£6.5 = 24

3 0
3 years ago
PLEASE HELP
Leto [7]

Answer:

DA = 285.7 m

Step-by-step explanation:

First we need to find the side AB in the triangle ABC, and we can do this using Pythagoras' theorem:

AB^2 = BC^2 + AC^2

AB^2 = 300^2 + 400^2

AB^2 = 25000

AB = 500 m

We can find the angle ABC with the tangent relation:

tangent(ABC) = 400/300 = 4/3

ABC = 53.13°

From triangle ABC, we have:

ABC + BCA + CAB = 180°

53.13 + 90 + CAB = 180

CAB = 36.87°

From triangle DAC, we have:

DAC + ACD + CDA = 180

36.87 + 45 + CDA = 180

CDA = 98.13°

Now to find the side of DA, we can use law of sines in triangle DAC:

DA/sin(DCA) = AC/sin(CDA)

DA/sin(45) = 400/sin(98.13)

DA = 400 * 0.7071 / 0.9899 = 285.7258 m

Rounding to nearest tenth, we have DA = 285.7 m

3 0
3 years ago
How to comparing 645 and 738 is different from comparing 645 and 649
defon
For starters, 700 and 600 are different 
3 0
3 years ago
Read 2 more answers
A lottery game has balls numbered 1 through 15. What is the probability of selecting an even numbered ball or a 13?
LiRa [457]

Answer:

8 / 15

Step-by-step explanation:

Sample space = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}

Required outcome :

Even numbers = (2, 4, 6, 8, 10, 12, 14) or 13

Total required outcomes = 8

Probability = required outcome / Total possible outcomes

P(even number or 13) = 8 / 15

4 0
3 years ago
Add the complex numbers: (4 + 8i) + (–2 – i) Question 6 options: A) 6 + 7i B) 2 + 9i C) 2 + 7i D) 6 + 9i
WITCHER [35]

Answer:

C) 2+7i   is the correct answer.

Step-by-step explanation:

simplify by combining the real and imaginary parts of each expression. in this question, the variable i represents an imaginary number.

8 0
3 years ago
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