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
WARRIOR [948]
3 years ago
12

selma is now 3 times older than joyce . four years ago , selma was 4 times as old as joyce was then . find their present ages

Mathematics
1 answer:
adoni [48]3 years ago
8 0

Present age of Selma = s

Present age of Joyce = j

Selma is now 3 times as old as joyce

s=3j........(1)

Four years ago,

s-4=j-4

then

Selma was 4 times as old as joyce

s-4=4(j-4)

s-4=4j-16

s=4j-16+4

s=4j-12.............(2)

Put the value of s in (2) from (1)

3j=4j-12

3j-4j=-12

-j=-12

Multiply by -1 both sides

j=12

Put the value of j in (1)

s=3j

s=3(12)

s=36

Present age of Selma = s = 36 years old

Present age of Joyce = j = 12 years old

You might be interested in
3. The box-and-whisker plot below shows the heights,in inches, of the students in a 7th grade class.What percentage of the heigh
Fantom [35]
(3) 62.5% cuz u take the total number of the students and u divide it by the number of students between 60 to 65
7 0
3 years ago
Find the common difference of the arithmetic sequence 3, -2, -7
svlad2 [7]

Answer:

-5

Step-by-step explanation:

To find the common difference, take the second term and subtract the first term

-2 - 3 = -5

Check with the third term and the second term

-7 - (-2) = -7 +2 = -5

The common difference is -5

4 0
3 years ago
Can someone help me ?
prisoha [69]
I’m pretty sure there are infinite solutions as the system of equations are equivalent to each other.
7 0
3 years ago
Read 2 more answers
Whats the percent change of 13.7 to 40.2
k0ka [10]

The percent change of 13.7 to 40.2 is 193.4%

To find percentage change, you need to find the difference between the two numbers. In this case, 26.5.

You then divide 26.5 by 13.7 and move the decimal point two spaces to the right.

6 0
3 years ago
Read 2 more answers
PLEASE HELP WITH #3 i’ll give brainliest
tekilochka [14]

Step-by-step explanation:

Lets begin with this 4x-25=x+14, 3x=39, so x=13, than we plug it in to side NP because that is the most simple one to plug it into to and that side is 27 since the triangle is equilateral all sides are the same so it is 27, 27, 27, for the sides and x=13

4 0
3 years ago
Other questions:
  • What is 18-2x(4+3) I need the answer
    7·2 answers
  • noah was assigned to make 64 cookies for the bake sale he made 125% of that number 90% of the cookies he made were sold.how many
    14·1 answer
  • A boat rental shop rents paddle boats for a fee plus an additional cost per hour. The cost of renting different numbers of hours
    5·1 answer
  • Question about dilation attached in images.
    14·1 answer
  • If the expression 3x + 2 is equal to 15 for some value of x, then which of the following is the value of 9x+5 for the same value
    11·2 answers
  • What is 100.2 percent as a fraction and decimal
    9·2 answers
  • To draw a line that is parallel to 9x+12y=16, what should the slope of the line be?(1 point)
    15·1 answer
  • Simplify 4^9/4^3<br> can someone help me with this?
    15·1 answer
  • What are the coefficients of each term in 4x -y -2x?
    12·1 answer
  • Can someone help me out with this question <br>bh step by step procedure? ​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!