Answer:
Either one of
.
Step-by-step explanation:
The easiest way to start off is to evaluate those arithmetic operations:

And all 4 of these are valid expressions equuivalent to the original.
Answer:
2.053 hours
Step-by-step explanation:
From the question,
A half marathon is around 13 miles. Brian can run about 6 1⁄3 miles per hour.
If Brian keeps his pace, how long will it take him to run a half marathon?
This is calculated as:
6 1/3 miles = 1 hour
13 miles = x hour
Cross Multiply
6 1/3 miles × x hour = 13 miles × 1 hour
x hour = 13 miles × 1 hour/6 1/3 miles
x hour = 13 ÷ 6 1/3 miles
x hour = 13 ÷ 19/3
x hour = 13 × 3/19
x hour = 39/19
x hour = 2.0526315789 hours
Approximately = 2.053 hours
It will take him 2.053 hours to run a half marathon.
Answer: The answer would be D.
Step-by-step explanation:
Subtracting 7 from 107 would make it 100. Adding that 7 to 353 would make in 360. It is easier to do 360 - 100 in your head.