Retrieval Practice by Boxed Rockets

Q1)

Toby is a plumber.
He starts a job at 8 am and finishes the job at 3 pm For this job, Toby charges £40 for every hour it takes him to complete this job plus £75 for the materials he uses. Work out how much Toby charges for this job.

$355$

Q2) A 6 sided bias die is rolled and the probabilities are shown below. Calculate x.

\begin{matrix} 1 & 2 & 3 & 4 & 5 & 6 \\ 0.15 & 0.15 & 0.15 & x & 0.1 & 0.15 \end{matrix}

x = 0.3

Q3) Solve the simultaneous equations below

\begin{matrix} 5 x - 2 y = 31 \\ 5 x - 3 y = 29 \end{matrix}

\begin{matrix} x = 7 \\ y = 2 \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

+	1	2	3	4	5
1	2	3	4	5	6
2	3	4	5	6	7
3	4	5	6	7	8