Retrieval Practice by Boxed Rockets

Q1)

Toby is a plumber.
He starts a job at 8 am and finishes the job at 4 pm For this job, Toby charges £40 for every hour it takes him to complete this job plus £60 for the materials he uses. Work out how much Toby charges for this job.

$380$

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

\begin{matrix} 1 & 2 & 3 & 4 \\ x & 0.15 & x & 0.2 \end{matrix}

x = 0.325

Q3) Solve the simultaneous equations below

\begin{matrix} 3 x + 4 y = 70 \\ 2 x - 4 y = -20 \end{matrix}

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