Retrieval Practice by Boxed Rockets

Q1)

Toby is a plumber.
He starts a job at 12 pm and finishes the job at 2 pm For this job, Toby charges £20 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.

$115$

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 & 0.1 & 0.1 & 0.25 & x & 0.05 \end{matrix}

x = 0.25

Q3) Solve the simultaneous equations below

\begin{matrix} 2 x - 5 y = -22 \\ 2 x - 4 y = -14 \end{matrix}

\begin{matrix} x = 9 \\ y = 8 \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	3	5
1	2	4	6
2	3	5	7
3	4	6	8
4	5	7	9
5	6	8	10