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The evening walk is shorter because 3/6 is 1/2 or .5 a mile, while 2/3 mile is .66 a mile
Answer:
B
Step-by-step explanation:
The Mean(Average) of 78+72+66+80+84 is 76 because (78+72+66+80+84)/5* and (78+72+66+80+84+100)/6* is 80.
*You get this number by counting the number of numbers you entered (78+72+66+80+84) there are 5 numbers.
If you add them straight down:
2d-e = 7
d + e = 5
Then the e's cancel out.
You are left with 3d = 12
Then solve for d by dividing each side by 3.
Now you have d =4.
To solve for e go back into one of your original equations and substitute 4 for the d.
You can use either equation, so I'll choose the second one.
4 + e = 5
Now solve for e by subtracting each side by 4.
Now you have e = 1.
So your solutions are d = 4 and e = 1