Retrieval Practice by Boxed Rockets

Q1)

Toby is a plumber.
He starts a job at 12 pm and finishes the job at 3 pm For this job, Toby charges £80 for every hour it takes him to complete this job plus £80 for the materials he uses. Work out how much Toby charges for this job.

$320$

Q2) A 5 sided bias die is rolled and the probabilities are shown below. Calculate x.

\begin{matrix} 1 & 2 & 3 & 4 & 5 \\ 0.2 & x & 0.2 & 0.1 & x \end{matrix}

x = 0.25

Q3) Solve the simultaneous equations below

\begin{matrix} 5 x + 4 y = 46 \\ x + 4 y = 38 \end{matrix}

\begin{matrix} x = 2 \\ y = 9 \end{matrix}

Q4) The numbers on the spinners are added, draw a sample space diagram to show all the possible outcomes

Spinner 1

Spinner 2

+	2	3	4	5
1	3	4	5	6
2	4	5	6	7
3	5	6	7	8
4	6	7	8	9
5	7	8	9	10
6	8	9	10	11