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
leonid [27]
2 years ago
6

The ages of Raju and Ravi arw the ratio of their ages will be 4:5 . Find their present ages.

Mathematics
1 answer:
larisa86 [58]2 years ago
3 0

Answer:

Step-by-step explanation:

The ages of Raju and Ravi are in the ratio 3:4 .Four years from now the ratio of their ages will be 4:5 . Find their present ages.

Ratio of ages at present = 3:4

Age of Raju = 3x

Age of Ravi = 4x

Age after four years:

Raju's age  = 3x + 4

Ravi's age = 4x + 4

Ratio of ages after four year = 4 : 5

3x +4 : 4x + 4 = 4 : 5

(4x + 4)*4 = (3x + 4)*5

16x + 16 = 15x + 20  

Subtract 16 from both sides

16x  = 15x + 20 - 16

16x = 15x + 4

Subtract 15x from both sides

16x - 15x = 4

 x = 4

Age of Raju = 3x = 3*4 = 12 years

Age of Ravi = 4x = 4*4 = 16 years

You might be interested in
Type the slope-intercept equation
natulia [17]

Answer:

y= -2x +1

Step-by-step explanation:

<u>slope- intercept form</u><u>:</u>

y= mx +c, where m us the gradient and c is the y-intercept.

Let's find the value of m first using the gradient formula.

Gradient= \frac{y1 - y2}{x1 - x2}

m =  \frac{ - 3 - 3}{2 - ( - 1)}  \\ m =  \frac{ - 6}{2 + 1}  \\ m =  \frac{ - 6}{3}  \\ m =  - 2

y= -2x +c

To find the value of c, substitute a pair of coordinates.

When x= -1, y=3,

3= -2(-1) +c

3= 2 +c

c= 3 -2

c= 1

Thus the equation of the line is y= -2x +1.

4 0
3 years ago
What's two equivalent from of3/5
jolli1 [7]
6/10 
300/500
30/50
60/100
12/20
4 0
3 years ago
Compute the amount of interest earned in the following simple interest problem.
Mumz [18]

Answer:

Step-by-step explanation:

P = $295

r =7%

t = 270 days = 270/365

Interest = Prt

=295*\frac{7}{100}*\frac{270}{365}\\\\= 15.28

= $ 15.28

Amount  = 295 + 15.28

Amount = $310.28

4 0
3 years ago
Seven times a number minus the number is -48.
DENIUS [597]
Same as the other one :) if u thought my answers were helpful to you please mark me as brainliest :)

5 0
3 years ago
Read 2 more answers
Pls pls help!!!!!!!!!!
netineya [11]

9514 1404 393

Answer:

  5

Step-by-step explanation:

Let f represent the number of friends. Their total earnings are ...

  21f = 105

  f = 105/21 = 5 . . . . . divide by the coefficient of f

There are 5 friends in the group.

5 0
3 years ago
Other questions:
  • Mrs. Hernanadez is covering the top of a kitchen shelf that is26 3/8 inches long and 15 1/2 inches wide. She incorrectly measure
    10·1 answer
  • A builder could get 6 sheets of sheetrock for 3$. If he bought 60 sheets , how much money would he have spent
    8·1 answer
  • HELP ASSAPPP WITH THIS QUESTION
    5·2 answers
  • Deanna gets 3 problems incorrect on her math quiz and scores 85%. How many questions were on the quiz?
    6·1 answer
  • The volume of water in a tank is 0.7 cubic meter. Write this volume in cubic centimeter​
    12·1 answer
  • Simplify the expression 2(7*-3)
    9·1 answer
  • Please help me it’s due today
    14·1 answer
  • A tree planted today has a height of 5 feet and grows one foot each month.
    13·1 answer
  • Find the midpoint of A and B where A has coordinates (2, 3)
    14·1 answer
  • Tell whether the following is geometric or not, if geometric find r
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!