1. $1.50 per hour, and a one-time cost of $5.
One hour: $1.50 + 5 = $6.50
10 hours: 1.50 x 10 = $15 + 5 = $20
Frugal
One hour: $1.25 + 6 = $7.25
10 hours: $1.25 x 10 = $12.5 + 6 = $18.50
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2. 1.50x + 5 = 1.25x + 6
Isolate the x, subtract 5 from both sides and 1.25x
1.50x (-1.25x) + 5 (-5) = 1.25x (-1.25x) + 6 - 5
1.50x - 1.25x = 6 - 5
.25x = 1
Isolate the x. Divide .25 from both sides
.25x/.25 = 1/.25
x = 4
Cost is the same at 4, with both shops charging $11
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3.
5 + 1.50(3) = 5 + 4.5 = 9.50
6 + 1.25(3) = 6 + 3.75 = 9.75
They should use Bargain Bikes as it is cheaper by $0.15
hope this helps
