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vfiekz [6]
3 years ago
14

HELP HELP HELP HELP HELP HELP!!!!!

Mathematics
1 answer:
sesenic [268]3 years ago
8 0

Answer:

..

Step-by-step explanation:

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Masha biked 20km 20 minutes faster than Dasha biked 20km. Find the speed of each cyclist if one biked 2km/h faster than the othe
motikmotik

Answer:

  • 12 km/h and 10 km/h

Step-by-step explanation:

Let the speed of Masha = s, speed of Dasha = d

  • Distance = 20 km
  • Time difference = 20 min = 1/3 hr
  • Speed difference  = 2 km/h

<u>As per above info we get following equations:</u>

  • s = d + 2
  • 20/s + 1/3 = 20/d

<u>Substitute s and solve for d:</u>

  • 20/(d + 2) + 1/3 = 20/d

<u>Get rid of fraction by multiplying all terms by 3d(d + 2):</u>

  • 60d + d(d + 2) = 60(d + 2)
  • 60d + d² + 2d = 60d + 120
  • d² + 2d = 120
  • d² + 2d + 1 = 121
  • (d + 1)² = 11²
  • d + 1 = 11
  • d = 10

<u>Find s:</u>

  • s = 10 + 2 = 12

<u>The answer is</u>

  • Masha's speed 12 km/h and Dasha's speed 10 km/h
3 0
3 years ago
You can't compare apples and orange
pychu [463]
This is a positive statement
3 0
3 years ago
Luba walked 5 miles in 1 1/2 hours. How fast did she walk in miles per hour?
katovenus [111]

Answer:

5m=11,2h

60/11

660+20

680/5

136

=2,15

4 0
3 years ago
Plz help out!! And no this is not a test :)
jolli1 [7]

9514 1404 393

Answer:

  B = (-4, 5)

Step-by-step explanation:

Reflection over the origin changes the signs of the coordinates.

  (x, y) ⇒ (-x, -y)

  (4, -5) ⇒ (-4, 5)

Point B is (-4, 5).

5 0
2 years ago
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Answer:

Step-by-step explanation:

7 0
3 years ago
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