Any Math Wiz here? Help please..?

Question

Another question..hehe

Q: In 1994 Tom was exactly three times as old as his son Jerry.

Let x be Jerry's age in 1994.

(a) Write down in terms of x:

i) Tom's age in 1994.........................................
ii) Jerry's age in 2004........................................
iii) Tom's age in 2004.......................................

(b) In 2004, Tom was twice as old as Jerry.

i) Write down an equation in x............................
ii) Solve this equation to find x............................
iii) How old were Jerry and Tom in 2004?..........


-Help please, it's too hard for me. Thanks! ^^

To all answerers, if you don't want to answer it just leave it alone. Please don't say anything that's gonna hurt the feelings of the people who asks. If we know the answer or if we know how to answer this, we'll not ask such questions.

Answer 1

Aw, come on, it's not that hard...

Since you know that Jerry's age = x, and Tom is three times as old, then Tom's age = 3x.
Now you can write the first three:

i : 3x (Tom's age in 1994)
ii: x+10 (x is jerry's age in 1994, plus ten years)
iii: 3x+10 (same reasoning)

Now for (b)

Okay, in 2004 Tom is twice as old as Jerry (careful, this one *can* get a bit tricky):

i: x = J*2 (an equation in x -- tom is twice as old, or 2 times, jerry's age)
ii: assign a value to J for jerry's age, say 20, and it's:
x = 20 * 2
x = 40

iii: No way to tell this without some additional information! You have to know how old one of them was at some point in time...

Answer 2

If X represents Jerry's age in 1994. Then:
i. 3x
ii. x + 10
iii. 3x + 10

You have to look at the whole thing as one big problem, so for the next part, you have to use what you did previously.
i. 2(x + 10) (which can be simplified to 2x + 20) <-- The x + 10 represents Jerry's age in 2004, because remember, x represents Jerry's age in 1994 and you need to keep it that way.
ii. 2x + 20 equals Tom's age in 2004. But remember we made another equation for Tom's age in 2004 in the last set of problems - 3x + 10. So since they both represent Tom's age in 2004 and Tom can't have two different ages, you can set them equal to each other and solve for X.
3x + 10 = 2x + 20
x = 10
So, Jerry was 10 in 1994. Which he means he is 20 in 2004 (x + 10).
Tom will be 40 (3x + 10 or 2x + 20)
I hope that helped!

Answer 3

For part a
Jerry= X
i) Tom's age in 1994 = 3X
ii) Jerry's age in 2004= X+10
iii) Tom's age in 2004= 3X+10

Part b:
in 2004, Tom was twice as old as Jerry
That means for i) 3x+10= 2(X+10)
ii) 3X+10 =2x+20
3X-2X = 20-10
X=10
iii) Jerry was 20 in 2004
Tom was 40 in 2004

Answer 4

(a)
i) 3x
ii) x + 10
III) 3x +10

(b)
i) 2(x +10) = 3x +10
ii) 2x +20 = 3x +10
10 = x
iii) Jerry in 2004 was (10 + 10) 20
Tom in 2004 was (30 + 10) 40

Answer 5

Jerry 20
Tom 40

Answer 6

Tom can't be three times, and twice as old as Jerry. What ever year it is.

Answer 7

a ) i) x
ii) x + 10
iii) 3x + 10

just working out the rest hold on

Answer 8

a(i) 3x
a(ii) x + 10
a(iii) 3x + 10
b(i) 2(x + 10) = 3x + 10
b(ii) x = 10
b(iii) Jerry = 20yrs & Tom = 40 yrs.

Answer 9

Email me at [e-mail] with all the homework help u need I'll get all the answers in before dark.

Answer 10

hi...hint 4 u...plus im only 12 so u must be dumb if your older than me...

in 1994
Tom = 10 older guy = 30
2004
Tom = 20 older guy = 40.