Retrieval Practice by Boxed Rockets

Q1)

Toby is a plumber.
He starts a job at 2 pm and finishes the job at 4 pm For this job, Toby charges £40 for every hour it takes him to complete this job plus £65 for the materials he uses. Work out how much Toby charges for this job.

$145$

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

\begin{matrix} 1 & 2 & 3 & 4 & 5 & 6 \\ x & x & 0.05 & 0.1 & 0.1 & 0.25 \end{matrix}

x = 0.25

Q3) Solve the simultaneous equations below

\begin{matrix} 5 x + 5 y = 15 \\ 3 x + 5 y = 13 \end{matrix}

\begin{matrix} x = 1 \\ 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

+	2	4	6	8	10	12
1	3	5	7	9	11	13
3	5	7	9	11	13	15
5	7	9	11	13	15	17
7	9	11	13	15	17	19
9	11	13	15	17	19	21