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Overview
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Question Progress
a)
Homework Progress
47179 Marks
A group of students were given a spelling test.
The table shows their marks.
Mark
Frequency
b)
6
5
a) Work out the range of the marks.
c
7
4
8
7
b) How many students are in the group?
9
10
c) Work out the mean mark of the group.
10
4

answer: 43/157

this is the answer and if you try to prove me wrong your a meanie

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

so the possibilities of the measurement of the side of the triangle are either it is longest side or not the longest side

when it is the longest side

s < 25 + 35s < 60

if it is not the longest side

35 < 25 + s10 < sso 10 < s < 60so the perimeter70 < p < 130

you can use a^2+ b^2=c^2