1.3 The family uses pre-paid electricity which is charged at R1.11 per kWh and the
first 50 units are free.
1.3.1 Determine the formula that can be used to calculate the total
cost of electricity.
1.3.2
The family uses 300 kWh of electricity per month, use the formula in
Question 1.3.1 to calculate the total cost of electricity used.
Rico
21 x 15/15
= 15
(3)
4
ed
Please turn over

a. she will receive a refund of $278.

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

step-by-step explanation:

where is the question is there is a formula or is there not one

show da graph

step-by-step explanation: