Wednesday

April 23, 2014

April 23, 2014

Posted by **Maddy** on Tuesday, August 13, 2013 at 5:51am.

Zac had some 2c stamps and 5c stamps.he needed to put 30c on a postcard to mail it.what combinations of stamps could he use.

- Maths -
**Reiny**, Tuesday, August 13, 2013 at 7:54amAssuming we can pay using either all 2c or 5c stamps...

let's start with

0 2c ----> 6 5c

1 2c ----> leaves 28 c, can't be done with 5c's

..

5 2c ---> leaves 20 c, paid with 4 5c

..

10 2c ---> 2 5c

15 2c ---> 0 5c

so in the form (2c , 5c) we have

(0,6) , (5,4), (10,2), and (15,0)

**Related Questions**

Math - Make a complete re search project on maths is interconnected with other ...

Maths - Hey :) I'm sitting my maths non-calculator GCSE tomorrow and am ...

Maths B - Charlotte received a score of 68 on both her English and Maths tests. ...

Maths B - Charlotte received a score of 68 on both her English and Maths tests. ...

maths letaracy,history,geography and life science - im going to grade 10 next ...

maths - i am told to do a project in maths it should involve a maths consept.pls...

MATHS - A store clerk sold 25 maths books and 10 english books for $855.00 .if ...

Maths - A school has eleven Year 9 Maths classes of 27 students. Each class has ...

presentation-maths - I have to do a presentation on maths. It is on time but I ...

Math - In a maths class of 13 students, 2/3 of boys and 1/4 of the girls love ...