Question

An electicity company charges per quarter as follows: a fixed charge of #50 and a charge of #3.50 per unit of current used
(a) calculate the charge for 460 units of electricity
(b) If VAT of 5% is paid on the bill, calculate the amount to be paid

Answer 1

you want y = mx+b where b is the constant part, and m is the rate:
y = 3.50x + 50

(a) now just plug in x=460
(b) multiply that by 1.05

Answer 2

483

Answer 3

Solve and explain

Answer 4

Can u pls show workings