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
4,11,22,37<br> Find an expression, in terms of n, for the nth term of this sequence.
Ivanshal [37]

Step-by-step explanation:

4+7=11

11+(7+4)=22

22+(7+8)=37

Every step 7+4n you must add

4 0
3 years ago
Find the x-intercept of 3x + 2y = 12 is (__, 0)
Anettt [7]
3x + 2y = 12

(x, y) = (__, 0)

3x + (2 x 0) = 12
3x + 0 = 12
3x = 12
x = 4

(4, 0)
7 0
3 years ago
URGENT: Find two functions f(x) and g(x) such that f[g(x)] =x but g[f(x)] does not equal x.
Delvig [45]
I think it does equal x but not really fully sure
4 0
3 years ago
I NEED HELP!!! PLEASE!!!!!!!!!!!!!!!!!
ale4655 [162]
The awnser to ur question is A because take 2.3 time 3 and get 6.9 and then add the 108 and -3 and get 105
3 0
3 years ago
HELP PLSSSSSS hdghgdhj
Zarrin [17]

Answer:

B

Step-by-step explanation:

11.3+4.2=15.5m to the nearest tenth

6 0
2 years ago
Read 2 more answers
Other questions:
  • What (3×5^2)/(5)^2 equal? Plz answer fast and with work and I will give brainliest
    6·1 answer
  • Help quickly please!!!
    9·1 answer
  • When i have a negative plus a positive of the same number , what is that called ?
    15·1 answer
  • Simplify the radical expression.
    7·1 answer
  • What is 15.6 over 100 in simplest form?
    5·1 answer
  • Kara earns 12 cent for each paper she delivers. If she delivers papers to 42 customers each day, how much does she earn in 1 wee
    6·2 answers
  • Two positive integers have a product of 176. One integer is 5 less than the other integer. Which equation can be used to find th
    9·1 answer
  • Anton leaves a cup of hot chocolate on the counter in his kitchen. Which graph is the best representation of the change in tempe
    6·1 answer
  • Does anyone know how to answer this
    6·2 answers
  • Need help with this !!!!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!