G8. C11.1 Functions

Arun buys some books online. The cost is $6 for each book plus postage of $4.

Work out the total cost, including postage, of 3 books!

Answer : $

Arun buys some books online. The cost is $6 for each book plus postage of $4.

Work out the total cost, including postage, of 6 books!

Answer : $

A plumber comes to a house to do a repair.

He charges a fixed fee of $45 plus $30 per hour.

Work out the total cost for a job that lasts 1.5 hours.

Answer : $

If y + z = 20 and z = 9, then y =

A function is given as p = 24 − 5q.

What is the value of p when q = 2?

p =

The area of a park can be found using the function A = 5L +12, where L is the length of the park. Hanane measures the length of the park to be 35 m. Work out the area of the park.

Answer :

Using r = 5 and m = 8, find the value of 3r − m.

Answer: 3r − m = _

Tanesha’s pay for working t hours is calculated using this formula.

$P = 12.5t + 50

Calculate how many hours Tanesha has worked for if she is paid $387.50.

Number of hours =

A function is given as p = 24 − 5q.

What is the value of q when p = 12?

Answer :

q =