MHB Vatha & Chris Ages: Solve to Find Out How Old They Are Now

historywept
Messages
2
Reaction score
0
Q: The sum of the present ages of Vatha and Chris is 36. In 4 years time, the sum of their ages will equal twice Vatha's present age. How old are they now?A: Vatha:22, Chris: 14 (from the back of the textbook, only I'm not sure how to get here)I'm a little stuck with this one. If you could please help me with it, and how to solve problems like this, I'd be very grateful.
 
Mathematics news on Phys.org
historywept said:
Q: The sum of the present ages of Vatha and Chris is 36. In 4 years time, the sum of their ages will equal twice Vatha's present age. How old are they now?
Denote their present ages by "V" and "C" respectively. The sum of their present ages is V+ C= 36. In 4 years time Vatha's age will be V+ 4 and Chris's age will be C+ 4. The sum of their ages then will be (V+ 4)+ (C+ 4)= V+ C+ 8. And that will be "twice Vatha's present age: V+ C+ 8= 2V. We already know that V+ C= 36 so V+ C+ 8= 36+ 8= 44= 2V.
A: Vatha:22, Chris: 14 (from the back of the textbook, only I'm not sure how to get here)I'm a little stuck with this one. If you could please help me with it, and how to solve problems like this, I'd be very grateful.
 

Thread 'What Exactly is Dirac’s Delta Function? - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
View full post »

Thread 'Fermat's Last Theorem'

Fermat's Last Theorem has long been one of the most famous mathematical problems, and is now one of the most famous theorems. It simply states that the equation $$ a^n+b^n=c^n $$ has no solutions with positive integers if ##n>2.## It was named after Pierre de Fermat (1607-1665). The problem itself stems from the book Arithmetica by Diophantus of Alexandria. It gained popularity because Fermat noted in his copy "Cubum autem in duos cubos, aut quadratoquadratum in duos quadratoquadratos, et...
View full post »

Thread 'Useless continued fraction for 1'

I'm interested to know whether the equation $$1 = 2 - \frac{1}{2 - \frac{1}{2 - \cdots}}$$ is true or not. It can be shown easily that if the continued fraction converges, it cannot converge to anything else than 1. It seems that if the continued fraction converges, the convergence is very slow. The apparent slowness of the convergence makes it difficult to estimate the presence of true convergence numerically. At the moment I don't know whether this converges or not.
View full post »

Similar threads

MHB Age word problem: when john is 12 years old, how old is his mother?
Replies
2
Views
1K
MHB How Old Is John Now?
Replies
2
Views
2K
MHB How old until mother is 4 times older
Replies
3
Views
2K
MHB Man's Age Now: Find Out His Digit Sum Born Year
Replies
4
Views
2K
Finding Present Ages: Solving a Two-Variable Linear Equation
Replies
16
Views
1K
How Do You Set Up an Equation for the Ages of John, Peter, and Alice?
Replies
29
Views
2K
MHB How Do You Solve a Geometric Sum with Alternating Signs?
Replies
2
Views
1K
I Understanding Spacetime simultaneity in twin paradox scenarios
Replies
35
Views
3K
How Old Is Tanya in This Age Problem?
Replies
12
Views
3K
MHB Solving Sequence Problem with Elementary Math Concepts
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top