20% = 0.80
80 x .80 = $64
15% = 0.85
10% = 0.90
95 X .85 = 80.75
80.75 X 0.90 = $72.68
Levis jeans at regular price is the better deal
Let S = his average speed.
Let D = distance traveled one way
Time = distance / speed
Set up an equation:
d/6 + d/12 = 2d/S
Multiply the equation by 12s:
12s(d/6) + 12s(d/12) = 12s(2d/s)
Simplify to get:
2sd + sd = 24d
Combine like terms:
3sd = 24d
Divide both sides by d:
3s = 24
Divide both sides by 3:
s = 24/3
s = 8
His average speed was 8 mph.
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Answer:
The use of symbols to represent ideas or qualities.
