(4,-1) is the correct answer.
Hope this helps:)
Answer:
68
Step-by-step explanation:
speed = distance/time
distance = 391 miles
time = 5 h + 45 m = 5.75 h
speed = (391 miles)/(5.75 h)
speed = 68 miles/hour
Answer: In 1 hour, it travels 68 miles.
Answer:
21,000
Step-by-step explanation:
........................
Answer:
The answer is 91
Step-by-step explanation:
We have the following equality:

Then a must satisfy that
. So,
or
.
1) If a=7, then, it follows for the first equality that 56=14b. Then b=4. Finally, substituting b=4 in the first equality we obtain that -64=16-c. So, c= 80. We conclude that
.
As the problem states, we only consider values of a greater than zero. Then 91 is the only solution for
.