130-54=76
You just need to know when there is +- you just subtract the numbers with the charge of the largest number
I don’t know what it is that’s confusing /72873)472
2.30 PM
Step-by-step explanation:
Olivia has a 1hr head start of Ben. While traveling at 55 mph she will have covered a distance of;
55 * 1 = 55 miles
Then Ben begins to travel at 65 mph which is
65 – 55 = 10 mph
Faster than Olivia.
This means that Ben will be closing in on the 55 miles head-start made by Olivia by 10 mph. To find out after how long Ben will completely close the gap;
55 / 10 = 5.5 hours
0.5 hours in minutes is;
5/10 *60 = 30 minutes
Ben will catch up to Olivia on;
9.00 + 5.30 = 14.30
= 2.30 PM
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Let
S = sum of the data values
n = number of data values
The mean M is equal to
M = S/n
since you add up the values and divide by n. We don't need to know what S or n are.
If we add 5 to each data value, then we're adding on n copies of 5, or 5n
The new mean N is
N = (S+5n)/(n)
N = (S/n) + (5n/n)
N = M + 5
The new mean is a result of taking the old mean M and adding on 5
So,
N = M+5
N = 10+5
N = 15
The standard deviation will remain the same because each data value hasn't moved in relation to one another. Every data value has been shifted up the same amount. For instance if A and B are two points in this data set, then A+5 and B+5 will be the same distance away. Apply this logic to any number of data values. While standard deviation isn't that simple, it still has a loose connection to "distance" of the values, or how spread out they are.
So that's why the final answer is choice C)
