Answer:
2hrs 40 minutes
Step-by-step explanation:
The formula for distance is expressed as:

#The time taken to run:

#The time taken to walk:

#Since the distances are the same:

Hence, Dana spends 2hrs 40 minutes walking back
It’s 7...your answer is 7
Answer:
c) 14/5 = 2.8 each (better value)
Step-by-step explanation:
a) 9/3 = 3 each
b) 28/7 = 4 each
c) 14/5 = 2.8 each (better value)
Answer: option d.
Step-by-step explanation:
You have the following formul given in the problem:

You know that:
The number of customers serviced in an hour by the technical support representative is 6 costumbers, therefore:

As the problem asked for the probability that a costumber will be on hold less than 30 minutes, we know that:

Substitute the values above into the formula.
Then, you obtain:
or 95%
Answer:
We have a + b as;
2 + 3 = 5
Step-by-step explanation:
Here, we want go get the value of a and b
from the second equation, we can get an expression for b
We have this as;
7a - b = 11
Thus,
b = 7a - 11
Now, from here, we can substitute the value of b into the first equation
We have this as;
5a + 4(7a - 11) = 22
5a + 28a -44 = 22
33a = 22 + 44
33a = 66
a = 66/33
a = 2
Recall;
b = 7a - 11
substituting the value of a from above;
b = 7(2) - 11
b = 14 - 11
b = 3