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Andrej [43]
3 years ago
10

Math help 100 points ALSO CHECK OUT MY PROFILE (MANY UNANSWERED QUESTIONS)!!!!!

Mathematics
2 answers:
amm18123 years ago
5 0
Midpoint formula:
1. Point 1 (-2,2) Point 2 (4,-1)
Midpoint: (-2+4/2, 2-1/2)(2/2, 1/2)(1, 1/2)
2. Point 1 (-3,-5)Point 2 (2, 5)
Midpoint: (-3+2/2, -5+5/2)(-1/2, 0)
Distance between two points formula:

1. Point 1 (-2, 2)Point 2 (4, -1)





2. Point 1 (1, 2)Point 2 (4, 7)





Studentka2010 [4]3 years ago
3 0
Midpoint formula:
( \frac{x1 + x2}{2}   \:  \frac{y1 + y2}{2} )
1. Point 1 (-2,2)
Point 2 (4,-1)

Midpoint: (-2+4/2, 2-1/2)
(2/2, 1/2)
(1, 1/2)

2. Point 1 (-3,-5)
Point 2 (2, 5)

Midpoint: (-3+2/2, -5+5/2)
(-1/2, 0)

Distance between two points formula:

\sqrt{(x2 - x1) {}^{2} + (y2 - y1) {}^{2}  }
1. Point 1 (-2, 2)
Point 2 (4, -1)

\sqrt{(4 + 2) {}^{2}  + ( - 1 - 2) {}^{2} }
\sqrt{6 {}^{2} + ( - 3) {}^{2}  }
\sqrt{36 + 9}
\sqrt{45}
6.7
2. Point 1 (1, 2)
Point 2 (4, 7)

\sqrt{(4 - 1) {}^{2} + (7 - 2) {}^{2}  }
\sqrt{3 {}^{2} + 5 {}^{2}  }
\sqrt{9 + 25}
\sqrt{34}
5.8
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maks197457 [2]

Answer:

Faster runner speed: 11 mph

Slower runner speed: 9 mph

Distance from starting point: 9.9 miles

Step-by-step explanation:

Let the slower runner speed be: x

Faster runner speed: x+2

1 hour 6 minutes = 1.1 hours

Slower: 1.1(x) = 1.1x miles

Faster: 1.1(x+2) = 1.1x+2.2 miles

This means that the faster runner had gone 2.2 miles more than the slower runner.

1.1x + 2.2 > 11 miles (This is true as we know the faster runner is coming back from the 11 mile run)

1.1x > 11 - 2.2 miles

1.1x > 8.8 miles

x > 8.8 / 2.2 miles

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x < 11 / 1.1 miles

x < 10 miles

8 < x < 10

Although x could be any number including decimal between 8 and 10, the obvious first answer would be 9. However we need to check if this answer is correct.

Slower runner distance to the end:

1.1(9) = 9.9 miles

11 - 9.9 = 1.1 miles

Faster runners distance from the end (when coming back)

1.1(9+2) = 1.1(11) = 12.1 miles

12.1 - 11 = 1.1 miles

The speeds 9 mph and 11 mph are now proven to be the right speeds. Using our equation before, we can figure out the distance from the starting point that they meet at. This is just how far the slower runner has gotten. So, 1.1(9) = 9.9 miles from the starting point

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Answer:

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