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Can someone help with this please

Can someone help with this please-example-1
User Farmio
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1 Answer

4 votes

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Answer:

a) (1.75 +1.00d)/4 < (3.50 +1.50d)/5

b) 3.70

Explanation:

a) You want ...

classic cost < XL cost

Using the given expressions for the costs, the inequality is ...

(1.75 +1.00d)/4 < (3.50 +1.50d)/5

__

b) For a 10-mile ride, the XL cost is ...

(3.50 +1.50(10))/5 = (3.50 +15.00)/5 = 18.50/5 = 3.70

Each passenger in a group of 5 friends pays $3.70 for the 10-mile ride.

_____

Additional comment

Each expression can be divided out to give ...

classic cost per person = $0.4375 +0.25d

XL cost per person = $0.70 +0.30d

Comparing these, we see there is no positive value of d that will make the XL cost per person be less than the classic cost per person. Both the initial fee and the per-mile cost are lower for the classic.

User Sean Christe
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