Money maths problem - Can someone check my answer?

Jenny

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Oct 15, 2014
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This is a question with multiple choice answer. Could you guys check if my answer is right? and if its not could you help me out?? Thank u :) much appreciated.

The cost of hiring the floor sander is shown below

FLOOR SANDER HIRE --> £12 BASIC CHARGE PLUS £18 PER DAY


1. What is the cost of hiring the floor sander for 4 days? the answer i chose was £84

(a) £60
(b) £72
(c) £84
(d) £120

2. A customer has £120. What is the longest time she can hire the sander for? I said 6 days

(a) 3 days
(b) 5 days
(c) 6 days
(d) 7 days

3. Which formula shows the cost in £(C) of hiring the sander for n days? ​i said C = 12+18n

(a) C= 12+18+n
(b) C= 12 +18n
(c) 12n +18
(d) C= 12
 
The cost of hiring the floor sander is: £12 BASIC CHARGE PLUS £18 PER DAY

1. What is the cost of hiring the floor sander for 4 days? the answer i chose was £84
To show your work, do something like the following:

. . . . .(4 days)*(18 per day) + (12 basic charge) = 72 + 12 = 84

This answer is correct.

2. A customer has £120. What is the longest time she can hire the sander for? I said 6 days
Yes. Can you get the answer if you don't have options from which to choose?

3. Which formula shows the cost in £(C) of hiring the sander for n days? ​i said C = 12+18n
Yes. ;)
 
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