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Let's break it down step by step:
*1. Find the cost of hiring a car for a journey of 120 km*
Given formula: k = Sl + 850
where k = cost, S = distance in km, and l = cost per km (which is not given, but we can still solve for k)
Plug in S = 120 km:
k = 120l + 850
Since we don't know the value of l, we can't find the exact cost. However, if you provide the value of l (cost per km), I can help you calculate the cost.
*2. How long is a journey if the cost of car hire is $2050?*
Given formula: k = Sl + 850
Rearrange the formula to solve for S (distance):
S = (k - 850) / l
Plug in k = 2050:
S = (2050 - 850) / l
S = 1200 / l