Answer:
d = 1.75 miles
Step-by-step explanation:
A track team ran 8 and 3/4 miles in 5 days.
We need to find the distance covered by it each day. Let the distance is d.
miles in 5 days
or
miles in 5 days.

So, each day the team will cover 1.75 miles.
Coefficient of variation, CV. for Data set A is
% and for Data set B is
%
Sample A:
Mean
, Standard deviation
.
C.V
Sample B:
Mean
, Standard deviation
.
C.V
In terms of percentage, C.V for sample A is
% and for sample B is
%
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i think that the answer is d. this must have 20 characters
Answer:
a = 4 b = 5
Step-by-step explanation:
8a + 12b = 92......eqn 1
6a - 4b = 4......eqn 2
multiply eqn 2 by 3
18a - 12b = 12.....eqn 2
add eqn 1 and 2 to eliminate b
26a = 104
a = 4
put a = 4 into eqn 2
18(4) - 12b = 12
72 - 12b = 12
72 - 12 = 12b
60 = 12b
5 = b