Question

Q5. A builder rents a digger. He pays a fixed charge of $30 plus $10 per hour to rent the digger. Work out how much he pays to rent the digger for: a) 1 hour b) n hours (1.5 x 2 = 3)

Q6) The width of a rectangle is x centimetres and its length is (x+ 2) cm. Write down an expression for the perimeter of the rectangle, giving your answer in its simplest form. (2+1=3 marks)

Answer 1

$30 + $10(hours he rented)
For one hour: $30 + 10•1 = $40
For n hours it’s 30 + 10n

Perimeter = length + length + width + width, so P = (x + 2) + (x + 2) + x + x
P = 4x + 4 and some teachers want you to pull out the common factor of 4. If yours does that, the final answer is
P = 4(x + 1)

Answer 2

Answer:How many hours does he rent it?

Either way, the equation would be 30 + 10x

x is the number of hours he rents the digger.

So for example, if he rented it for say 8 hours

30 + 10(8)

30 + 80

$110

Explanation: