Retrieval Practice by Boxed Rockets

Q1)

Toby is a plumber.
He starts a job at 9 am and finishes the job at 1 pm For this job, Toby charges £70 for every hour it takes him to complete this job plus £55 for the materials he uses. Work out how much Toby charges for this job.

$335$

Q2) A 4 sided bias die is rolled and the probabilities are shown below. Calculate x.

\begin{matrix} 1 & 2 & 3 & 4 \\ 0.15 & 0.05 & x & 0.3 \end{matrix}

x = 0.5

Q3) Solve the simultaneous equations below

\begin{matrix} 5 x - 2 y = 8 \\ 2 x - 4 y = 0 \end{matrix}

\begin{matrix} x = 2 \\ y = 1 \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	6
2	3	4	5	6	7	8
4	5	6	7	8	9	10
6	7	8	9	10	11	12
8	9	10	11	12	13	14
10	11	12	13	14	15	16