Q&A - P4 Math

[Champion]

Hi! Needs help to understand the question and the solution provided in the answer sheet; :thankyou: in Advance.


The total age of Andy and Karen is 56 years.
In four years' time, Andy will be three times as old as Karen.
How old is Andy now?

Answer sheet solution
In 4 years time, the total age of the two people will increase by 8 years.
Karen: 1 unit
Andy: 3 units
4 units = 56+8=64
1 unit = 64/4= 16
3 units = 3 x 16 = 48
48-4 = 44

Andy is 44 years old now.

Can someone explain to me - the 1st part about in 4 years time, total of the 2 people will increase by 8 years :?

[Augmum]

Champion:

Hi! Needs help to understand the question and the solution provided in the answer sheet; :thankyou: in Advance.


The total age of Andy and Karen is 56 years.
In four years' time, Andy will be three times as old as Karen.
How old is Andy now?

Answer sheet solution
In 4 years time, the total age of the two people will increase by 8 years.
Karen: 1 unit
Andy: 3 units
4 units = 56+8=64
1 unit = 64/4= 16
3 units = 3 x 16 = 48
48-4 = 44

Andy is 44 years old now.

Can someone explain to me - the 1st part about in 4 years time, total of the 2 people will increase by 8 years :?

Hi, happens to see this question.....
Becos the question given is the total age of 2 persons, Andy n Karen.
for Andy, in 4 yrs time will be +4 and for Karen, in 4 yrs time will also be +4,
So total +8 yrs.....
Hope it helps.....

[Champion]

Augmum:

Champion:

Hi! Needs help to understand the question and the solution provided in the answer sheet; :thankyou: in Advance.


The total age of Andy and Karen is 56 years.
In four years' time, Andy will be three times as old as Karen.
How old is Andy now?

Answer sheet solution
In 4 years time, the total age of the two people will increase by 8 years.
Karen: 1 unit
Andy: 3 units
4 units = 56+8=64
1 unit = 64/4= 16
3 units = 3 x 16 = 48
48-4 = 44

Andy is 44 years old now.

Can someone explain to me - the 1st part about in 4 years time, total of the 2 people will increase by 8 years :?

Hi, happens to see this question.....
Becos the question given is the total age of 2 persons, Andy n Karen.
for Andy, in 4 yrs time will be +4 and for Karen, in 4 yrs time will also be +4,
So total +8 yrs.....
Hope it helps.....

Thank you, Augmum for the explanation; Appreciates very much :))

[vsk]

Jim bought 3 goldfish and 4 swordtails and paid $8.10. He then bought 5 goldfish and 2 swordtails and paid $9.30. How much did he pay for goldfish ?.


Kindly help to resolve this. Thanks.

[corneyAmber]

vsk:

Jim bought 3 goldfish and 4 swordtails and paid $8.10. He then bought 5 goldfish and 2 swordtails and paid $9.30. How much did he pay for goldfish ?.


Kindly help to resolve this. Thanks.

3G + 4S -> 8.10
[5G + 2S -> 9.30] x 2
10G + 4S ->18.60
(10-3)G -> 18.60-8.10
7G -> 10.50
G -> $1.50
8G -> 1.5 x 8 = $12

The gold fishes are $12.

[BigDevil]

ksi:

7G -> 10.50
G -> $1.50
8G -> 1.5 x 8 = $12

The gold fishes are $12.

I think you meant G -> $1.05
8G -> 1.05 x 8 = $8.40

[corneyAmber]

BigDevil:

ksi:

7G -> 10.50
G -> $1.50
8G -> 1.5 x 8 = $12

The gold fishes are $12.

I think you meant G -> $1.05
8G -> 1.05 x 8 = $8.40

If you subtract the 2 equations, do you get G=1.05?

[BigDevil]

:oops:


My eyes got stamp. Thought I saw 10G -> $10.50

[corneyAmber]

BigDevil:

:oops:


My eyes got stamp. Thought I saw 10G -> $10.50

No problem...For a moment I thought my eyes got stamp....kekeke. Thanks for clarifying.

[vsk]

ksi:

vsk:

Jim bought 3 goldfish and 4 swordtails and paid $8.10. He then bought 5 goldfish and 2 swordtails and paid $9.30. How much did he pay for goldfish ?.


Kindly help to resolve this. Thanks.

3G + 4S -> 8.10
[5G + 2S -> 9.30] x 2
10G + 4S ->18.60
(10-3)G -> 18.60-8.10
7G -> 10.50
G -> $1.50
8G -> 1.5 x 8 = $12

The gold fishes are $12.

Thank you very much KSI. Appreciate your help very much. :thankyou: