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
mash [69]
3 years ago
10

A mother who is 40 years old has a daughter and a son. The son is twice as old as the daughter. In 15 years the sum of all their

ages will be 100 years. How old are the siblings now?
Mathematics
2 answers:
Talja [164]3 years ago
8 0

Answer:

15 and 5

Step-by-step explanation:

Mother's current age:  40

daughter's age:  d

son's age:  s

son is 2x as old as daughter:  s = 2d

Then, 15 years from now, the sum of their ages will be:

(40 + 15) + (2d + 15) + (d + 15) = 100

or

55 + 15 + 15 + 3d = 100

85 + 3d = 100, or 3d = 15, or d = 5.

Then the son's age is 3(5) = 15 and the daughter's is 5.

lakkis [162]3 years ago
6 0

Answer:

the son is 30 and the daughter is 15

Step-by-step explanation:

the mom is 55 in 15 years

100-55=45

45-30=15

15x2=30

You might be interested in
Math help please. Tanks :]
xxTIMURxx [149]
The answer is 0.375% because...
7 0
3 years ago
If the volume of a given cube is 729 cubic inches, what is the surface area of the
balandron [24]

Answer:

A=6V⅔=6·729⅔≈486

a=486

so the answer is a

Hope This Helps!!!

5 0
3 years ago
Read 2 more answers
The perimeter of a rectangle is 72 in. The base is 3 times the height. Find the area of the rectangle
Ulleksa [173]

Answer:

243 inches squared

Step-by-step explanation:

1) The total perimeter for each part is 8x.

2) 72 divided by 8 = 9

3) height = 9 base = 27

4) 9 x 27 = 243 inches squared

8 0
4 years ago
List the variables in the following.<br>p + 3q- 4r​
skad [1K]

Answer:

p, q, and r are your variables. Bonus: + and - are your operations, and 3 and 4 are your coefficients.

Step-by-step explanation:

3 0
3 years ago
Can somebody please write it down like show the work I need to know thanks
Nataly [62]

Answer:

-5/33

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • HELP FAST PLEASE fast!!!!!!!!!1
    9·1 answer
  • jennifer bikes 7 miles south and then turns to bike 13 miles east how far away is she from where she started?
    8·1 answer
  • How do you get the awnser os 3.55 divided by 5 equals 0.71
    13·1 answer
  • Every morning before school, Ms. Rudolph has a hot drink of coffee and sugar dissolved in water. In this solution, the water is
    6·1 answer
  • the sum of three number is 202, the second is three more than the first number, the third number is three times the second numbe
    13·1 answer
  • Which of these is an example of a literal equation?
    15·2 answers
  • Please help i don't get it
    8·2 answers
  • Which number does NOT represent an integer? A. 3 B. 20.1 C. -10 D. 20/4​
    5·1 answer
  • Seven added by a number m is equal to twice the same number increased by three.
    8·1 answer
  • Ricardo is factoring the polynomial, which has four terms. 5x3 20x2 2x 8 5x2(x 4) 2(x 4) Which is the completely factored form o
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!