You use your mobile phone to phone home every day. it costs £15 per month and 18p per minute for phone calls.

how much will you have to pay for 420 minutes of calls including the monthly charge?

£

90.60 pounds

Step-by-step explanation:

So with this question, we have both a set rate and a variable rate.

To work out the answer, we will find the cost of calls made. To do this, we need to multiply the amount of minutes of calls by the rate given.

In this case, it costs 18p per minute, and 420 minutes of calls have been made. So we will multiply 18p by 420 minutes:

18 x 420 = 7560p

When we convert this to pounds, it becomes 75.60 pounds.

We add this amount to the set rate, which is 15 pounds:

75.60 + 15 = 90.60 pounds

(I hope I did the conversion from pence to pounds right, my currency is the dollar, so I wasn't completely sure.)

Hope this helps,

Cate

step-by-step explanation: