Answer:
yes
Step-by-step explanation:
Answer:
D. Grant did not regroup the 4 tens when he subtracted 7.
Step-by-step explanation:
In the process of subtraction, regrouping is important so that each digit in the given numbers are placed appropriately before the required arithmetic operation is performed.
The correct step to Grant's solution are:
360 - 100 = 260
260 - 20 = 240
240 - 7 = 233
Grant's final answer ought to have been 233.
Going through his solution, he made a mistake while subtracting 7 from 240. He failed to regroup the 4 tens when he subtracted 7 from 240. Thus the essence of his wrong answer.
Remember that Distance = (Average speed)(Time)
Let x be the distance between Detroit and Columbus.
We know the journey from Detroit to Columbus took a time t, and the returning trip took a time t+

. We also know the Average speed of both journeys, so now we can set our equations:

Now, we can replace equation 1 into equation 2 to find t:




Now that we know t, we can replace it into our equation 1 to get the distance:


We can conclude that the distance between Detroit and Columbus is 220 miles. <span />
Answer:
Step-by-step explanation: