Formula

[Fot]

Hi All
New to this site, and I'm attempting to brush up on my Maths skills (I left school 33 years ago).
To the question:

David and 3 friends are going ice skating. They hire 4 pairs of ice skates for 3 hours.
The formula below is for working out the cost of hiring the stakes including a deposit.

C=s(3h+5)

C = total cost
s = number of pairs of ice skates
h = number of hours

How much will it cost to hire 4 pairs of ice skates?

I answered £32 but the answer is £56

Can somebody please explain how this is?

Many thanks

 

[Romsek]

\(\displaystyle C = 4(3\cdot 3 + 5) = 4 \cdot(9+5) = 4 \cdot 14 = 56\)

most likely you left out the 3 for 3 hrs

 

[Fot]

ok thank you, but how do you get to 3.3 or 3*3

 

[Fot]

ok thank you very much for your help

 

[Deleted member 4993]

ok thank you, but how do you get to 3.3 or 3*3

Please read the given equation carefully:

C=s(3h+5)

What does "3h" mean to you? How much is "h" according to the problem statement?

 

[Fot]

h is 3 so 3*3 = 9
I understand now, thanks

 

[HallsofIvy]

Hi All
New to this site, and I'm attempting to brush up on my Maths skills (I left school 33 years ago).
To the question:

David and 3 friends are going ice skating. They hire 4 pairs of ice skates for 3 hours.
The formula below is for working out the cost of hiring the stakes including a deposit.

C=s(3h+5)

C = total cost
s = number of pairs of ice skates
h = number of hours

How much will it cost to hire 4 pairs of ice skates?

I answered £32 but the answer is £56

Can somebody please explain how this is?

Many thanks

Could you explain how you got £32?