45 Nora's money was equal to
25 of Shannon's money at first. After Nora spent $2.20 and Shannon spent $0.90, Nora had
25 as much money as Shannon.
- How much did Shannon have at first? Express your answer in 2 decimal places.
- How much did Nora have in the end? Express your answer in 2 decimal places.
| |
Make p the same
(3)x5 |
Nora
(1) |
Shannon
(2) |
Make p the same
(4)x2 |
| Before |
25 u |
5 u |
10 u |
20 u |
| Change |
- 11 |
- 2.2 |
- 0.9 |
- 1.8 |
| After |
10 p |
2 p |
5p |
10 p |
45 Nora's money =
25 Shannon's money
45 Nora's money =
410 Shannon's money
Nora's money : Shannon's money = 5 : 10
(3) = (4)
25 u - 11 = 20 u - 1.8
25 u - 20 u = 11 - 1.8
5 u = 9.2
1 u = 1.84
Amount Shannon has at first
= 10 u
= 10 x 1.84
= 18.4 (a)
Amount Nora has in the end
= 5 u - 2.2
= (5 x 1.84) - 2.2
= 7 (b)
Answers: (a) $18.40; (b) $7.00
