Please help me with this question
1 answer:
The equation of a circle is:
where center is (h,k) and radius is r. Therefore, in this question, you need to check if the (h,k) values are the same. Let's view each option and judge accordingly:
A. (0,-4) and (-4,0) : Nope
B (-3,3) and (3,-3) : Nope
C. (7,2) and (-7,-2) : Nope
D. (2,5) and (2,5): Yes, the centers are equal.
Therefore, your answer is option D.
where center is (h,k) and radius is r. Therefore, in this question, you need to check if the (h,k) values are the same. Let's view each option and judge accordingly:
A. (0,-4) and (-4,0) : Nope
B (-3,3) and (3,-3) : Nope
C. (7,2) and (-7,-2) : Nope
D. (2,5) and (2,5): Yes, the centers are equal.
Therefore, your answer is option D.
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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 />
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+
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 />