Answer:
c
Step-by-step explanation:
Hello there.
Explanation:
↓↓↓↓↓↓↓↓↓↓
First, subtract by 4 from both sides.
Second, simplify.
Third, divide by -1 from both sides.
Fourth, simplify.
Next, add by 3 from both sides.
Then simplify.
Therefore, divide by 2 from both sides.
Finally, simplify.
<u><em>Answer⇒⇒⇒⇒x=2</em></u>
Hope this helps!
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-Charlie
Answer:
16.68 cm
Step-by-step explanation:
Given that :
Mean , m = 15
Standard deviation, s = 2
Length of salamander that would Place it at 80% of salamander length :
P(Z ≤ x) = 0.8
Zscore equivalent to 0.8 = 0.842
Using the relation :
Zscore = (x - m) /s
0.842 = (x - 15) / 2
1.684 = x - 15
Add 15 to both sides
1.684 + 15 = x - 15 + 15
16.684 = x
Hence, x = 16.68 cm
Given:
An athlete who makes laps in 3 mins 45 seconds on a 400m field.
To find:
The speed of the athlete in m/s.
Solution:
We know that,
Distance covered in 1 lap = 400 m
Distance covered in laps = m
= m
= m
We know that,
1 minute = 60 seconds
3 minutes = 180 seconds
3 minutes 45 second = 180 + 45 seconds
= 225 second
The speed of the athlete is:
Therefore, the speed of the athlete is about 8.44 m/s.
Answer:
72
Step-by-step explanation:
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