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
zaharov [31]
3 years ago
13

'X' years ago, Rakesh's age was twice his brother's age and '4X' years ago, Rakesh's age was thrice his brother's age. If it is

known that 'X' is a natural number, then what can be the absolute difference between their present ages? plz answer it fast it's urgent​
Mathematics
1 answer:
Kryger [21]3 years ago
6 0

Answer: The difference must be a multiple of 6

Step-by-step explanation:

R is Rakesh's age and B is the age of the brother.

the equations we have are:

(R - X) = 2*(B - X)

(R - 4X) = 3*(B - 4X)

where X must be a natural number.

we can write it as

(R - B) = -X + B

(R - B) = 2B - 8X

-X + B = 2B - 8X

B = 7X

then:

R - 7X = 6X

This means that the difference between their ages is a multiple of 6, for example, if the difference between them is 12 years, we have X = 2

R - 2 = 2*B - 4

R - 8 = 3*B - 24

in the first equation:

R = 2*B - 2

we replace it in the second eq:

2*B - 10 = 3*B - 24

B = 14 = 7*X = 7*2

and R = 14 + 12 = 26

You might be interested in
Solve the following proportion x/3 = 6/9<br>18<br>27<br>2<br>24
Talja [164]
X/3 = 6/9
x= 6/9 x 3/1
x = 18/9 = 2

ANSWER=2
6 0
3 years ago
12 is what percent of 19​
VikaD [51]

Answer:

63%

Step-by-step explanation:

12/19=0.63157895

0.63157895*100=63.1578947

7 0
3 years ago
The life expectancy (in hours) of an electric bulb is normally distributed with a mean of 5000 and a standard deviation of 1000.
Sergeu [11.5K]

Answer:

P(z>1.3) = 0.9032

Step-by-step explanation:

We are given:

Mean = 5000

Standard deviation = 1000

x = 6300

P(x>6300)=?

z-score =?

z-score = x- mean/standard deviation

z-score = 6300 - 5000/1000

z- score = 1300/1000

z-score = 1.3

So, P(x>6300) = P(z>1.3)

Looking at the z-probability distribution table and finding value:

P(z>1.3) = 0.9032

So, P(z>1.3) = 0.9032

7 0
3 years ago
I need this solved ASAP please<br> ratio 4:12 simplified.​
saveliy_v [14]
I’m not 100% certain but i’m pretty sure 1:3 works
5 0
3 years ago
Read 2 more answers
I need help please
nlexa [21]

Answer:

49

Step-by-step explanation:

No she is not correct because we dont have only one angle angle G is 90.

So we can easily find the angle D

180-(90+41) =49

7 0
2 years ago
Other questions:
  • -5x - 4y = 10 what are the intercepts
    6·2 answers
  • -7x-8=x-8(1-5x)<br> Help me please
    11·1 answer
  • How to solve a system with variables
    9·1 answer
  • If the area of triangle is 1200 sq m and its length is 60 m , find the breadth .
    6·1 answer
  • The table represents the multiplication of two binomials. Which letters from the table represent like terms? A and B B and C A a
    6·2 answers
  • State the domain and range of this relation and whether or not it is a function. (Pic above)
    11·2 answers
  • Please please help! exam and I only have IO minutes left
    6·1 answer
  • Ana buys a sweater for $25.60, and it is on sale for 35% off. what is the amount of the discount?
    6·2 answers
  • a Draw a line representing the "rise" and a line representing the "run" of the line. State the slope of the line in simplest for
    7·1 answer
  • A zoo has 9 lions. 6 are males. Find the ratio of female lions to male lions.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!