Question

The cost C , in £, of a monthly phone contract is made up of the fixed line rental L , in £, and the price P , in £ ,of the calls made. Enter a formula for the cost and, enter the cost if the line rental is £35 and the price of calls made is £13.

Answer 1

SOLUTION

GIVEN

The cost C , in £, of a monthly phone contract is made up of the fixed line rental L , in £, and the price P , in £ ,of the calls made.

TO DETERMINE

Enter a formula for the cost and, enter the cost if the line rental is £35 and the price of calls made is £ 13.

EVALUATION

Here it is given that the cost C , in £, of a monthly phone contract is made up of the fixed line rental L , in £, and the price P , in £ ,of the calls made

So the required formula for cost is

C = L + P

Again it is given that the line rental is £35 and the price of calls made is £ 13

∴ L = 35 & P = 13

So the formula C = L + P gives

C = 35 + 13

$\implies \sf{C = 48}$

Hence the cost is £ 48

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