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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. ✓✓

Respuesta :

Answer:

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.
C=2n+10
C- cost
n- number of hrs
C=30$
n=?
2n+10=30
2n=30-10
2n=20
n=20/2
n=10 hrs

You rented the bike for 10 hrs.