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Question 451462:
Found 2 solutions by edjones, tr000y:
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
5)
Let c=cost of the car.
.06(6000-c)/3 + 2*.04(6000-c)/3 = 140
.06(6000-c)+.08(6000-c)=420 multiply each side by 3.
360-.06c+480-.08c=420
-.14c=-420
c=$3000.
.
Ed

Answer by tr000y(1) About Me  (Show Source):
You can put this solution on YOUR website!
1) Let X = Number of oranges
1.44/12 = .12 per orange
4/5X (.6/4) + 1/5X (.25/2) - .12X = 5
2.4X/20 + .25X/10 -.12X = 5
.12X + .025X - .12X = 5
.025X = 5
X = 200
3) Ratio 15:6:4
15+6+4 = 25
15000/25 = 600
15*600 = 9000 (5c stamps)
6*600 = 3600 (6c stamps)
9000 - 3600 = 5400