# Tina and Tom were twins. Tina saves and Tom spends. Tom found a \$20 note on Sund

1. 43
HAPPY_STARposted 8 years ago

Tina and Tom were twins. Tina saves and Tom spends. Tom found a \$20 note on Sunday evening and spent

Tina and Tom were twins. Tina saves and Tom spends. Tom found a \$20 note on Sunday evening and spent \$2 a day starting on Monday. But Tina started work that Monday and gets \$2.50 a day. What is the first day when Tina has more money than Tom?

2. 81
ngurecoposted 8 years ago

Let Y be the day when Tina's Money is equal to that of Tom's money.

20 - 2Y = 2.5 x Y
20 = 2.5 x Y + 2Y
20 = 4.5 x Y
Y = 20/4.5
Y = 4.44

Tina had more money by around midday on Friday.

But you should learn to do your class home work on your own.

3. 71
t.eliaposted 8 years ago

Tom has \$20 which he spends @ \$2 per day starting Monday.

Tina saves \$2.50 per day starting on the Monday.

One needs to find out on what Day does

Tina have more money than Tom?

\$2.50 will be represented by 2.5

Therefore  I'll use the formula

.................... 2.5n  >  20 - 2n (change side -  change sign)

...........2.50n  +  2n  >  20

.....................4.5n  >  20

..........................n  > 20 / 4.5

..........................n  > 4.44...

So Tina had more money than Tom in the 5th day which was the Friday, as n  >  4.44

To prove this let 5 represent n in the formula

........................2.5n  >  20 - 2n

...............=    (2.5 x 5)  >  20 - (2 x 5)

...............=.......12.5      >  20 - 10

...............=.......12.5      >   10