9). Four friends earned $4.20 for washing a car. They decided to split the money equally. How much money did each friend get?
2 answers:
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Answer:
k = 4
Step-by-step explanation:
Given that a varies directly as b then the equation relating them is
a = kb ← k is the constant of variation
To find k use the condition a = 8 when b = 2
k = =
= 4