Answer:
71°
Step-by-step explanation:
3x° + (x - 11)° + (2x - 55)° = 360°
3x + x - 11 + 2x - 55 = 360°
6x - 66 = 360°
6x = 360° + 66°
6x = 426°
x = 71°
The modal class is 70 - 80 and the mean speed is 66.4
<h3>How to determine the modal class?</h3>
The table of values is given as:
Speed Frequency
40 - 50 10
50 - 60 16
60 - 70 19
70 - 80 23
80 - 90 12
The modal class is the class with the highest frequency
The class 70 - 80 has the highest frequency of 23
Hence, the modal class is 70 - 80
<h3>How to determine the mean?</h3>
Rewrite the frequency table to include the class midpoints
x f
45 10
55 16
65 19
75 23
85 12
The estimate of the mean speed is then calculated as:
So, we have:
Evaluate
Hence, the mean speed is 66.4
Read more about mean and mode at:
brainly.com/question/14532771
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10.4 in a mixed number in the simplest form is 10 2/5
Answer:
54^2
Step-by-step explanation:
Hope this helps
Answer:
Monday = -20
Tuesday = -20 + (-5) = - 25 degrees Celsius
Thursday = -20 + 3(-5) = - 35 degrees Celsius
Friday = -20 + 4(-5) = - 40 degrees Celsius
Saturday = -20 + 5(-5) = - 45 degrees Celsius
Step-by-step explanation: