21 miles/49 hours = 15 miles/h hours
a.35
b.2.5
c.4.2
d.6.0
thank you so much
answer is a
21 miles/49 hours = 15 miles/h
Cross multiply.
21h = 735
Divide both sides of the equation by 21.
Yes, a.
To find the speed in miles per hour, we need to divide the total distance by the total time traveled.
Total distance = 21 miles
Total time = 49 hours
Speed = Total distance / Total time
Speed = 21 miles / 49 hours
To simplify the speed, divide the numerator and denominator by the greatest common divisor (GCD) of 21 and 49, which is 7.
Speed = (21 miles / 7) / (49 hours / 7)
Speed = 3 miles / 7 hours
Therefore, the answer is 3 miles per 7 hours.
None of the options provided matches this value.
To find the answer to this question, we need to divide the total distance traveled (21 miles) by the total time taken (49 hours). This will give us the average speed in miles per hour.
So, let's perform the calculation:
21 miles / 49 hours = 0.42857 miles per hour (rounded to five decimal places)
Since the answer choices are given in whole numbers, we need to round the result to the nearest whole number. In this case, the rounded answer is 0.
Now let's compare the rounded answer, 0, to the given answer choices:
a. 35
b. 2.5
c. 4.2
d. 6.0
Among the given choices, the closest whole number to 0 is 2.5. Therefore, the correct answer is (b) 2.5.