Question

An electricity company uses the formula below to calculate bills.

How much is Freya's bill if she uses 250 units of electricity? Give your answer in pence (p).
c=17n + 12
c = total cost in pence
n = number of units of electricity

Answer 1

The answer is 4,262 pence

Answer 2

According to the formula, the total cost (c) in pence is calculated by multiplying the number of units of electricity (n) by 17 and adding 12. In Freya's case, she has used 250 units of electricity, so we can plug this value into the formula to calculate her bill:

c = 17 * 250 + 12 = 4250 + 12 = 4262 p

Therefore, Freya's bill is 4262 p if she uses 250 units of electricity.