The cost of renting a bike at Centre Island in Toronto is represented by the equation C = 2n + 10, where C is the cost of renting a bike and n is the number of hours of bike rental. [A4] a) How long did you rent the bike for if the cost is $30? ✓✓

b) Rearrange C = 2n + 10 to isolate n. ✓✓

A) 10

B) (C+10)/2 = n

Step-by-step explanation:

A) We know that the total cost is represented by the variable C. So, basically the problem is saying that the variable C is equal to 30. If we plug that into the equation, we get 30 = 2n + 10. Solving this, we get n = 10.

B) Isolating a variable means to only have the specified variable on one side and have all other integers and variable on the other side. So, the final answer would be (C+10)/2 = n.

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step-by-step explanation:

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