The wind-speed, in miles per hour (mph), was measured every six hours during a day on the Isles of Scilly. The results are shown in the table below.
Time 00:00 06:00 12:00 18:00 24:00
a) Complete the time series
Wind-speed
1 8 13 12 2
(mph)
graph shown.
Wind-speed (mph)
16+
b) Find the mean and
median of the recorded
wind-speeds given.
121
8
Mean:
+
Median:
0
00:00
06:00
12:00
18:00
24:00 Time

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14