Quiny and Mandy saved $5748.40 altogether. 0.4 of Quiny’s savings was $431.50 more than 0.2 of Mandy’s savings. How much more money than Quiny did Mandy save? [4 marks][Answer given: $477.80]
Quiny's money --> 10 Q
Mandy's money --> 10M
4 Q --> 2 M + $431.50
2 M --> 4 Q - $431.50
10 M --> 20 Q - 5 x 431.50 = 20 Q - $2157.50
10 Q + 10 M --> $5748.40
30 Q --> 5748.40 + 2157.50 = 7509.90
10 Q --> 7509.90/3 = $2635.30
10 M --> 2 x 2635.30 - 2157.50 = $3113.10
10 M - 10 Q --> 3113.10 - 2635.30 = $477.80
It was $477.80.
Model Drawing
------------------
431.50 / 2 = $215..75 0.4 = 4/10 = 2/5
Compare 2 units of Q (total 5 units) with 2 units of M (total 10 units)
Q [][215.75][][ ][][ ][][ ][][ ] ] $5748.40
M [][][][][][][][][][] ]
215.75 x 5 = 1078.75
15 u --> 5748.40 - 431.50 = 4669.65
5 u --> 5/15 x 4669.75 = 1556.55
1078.75 - 1556.55 = $477.80
It was $477.80.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment