Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Algera questions, please help!?
1. Given the line segment between 1 and 9, find the point that divides the line segment into a ratio of 3:5
2. Find the midpoint of the line segment having endpoints at (4, 2) and (-2, 8).
3. Find the distance between the (-4, 3) and (2, -1) using the distance formula.
4. Determine the equation of the parabola in the form y=ax2 + bx + c given the focus (2, 5) and directrix y = 3.
Please help! These questions are gonna be on my test this week!!!
1 Answer
- BattleaxeLv 77 years ago
1) Segment is 8 units long so dividing it into 3:5 puts the mark 3 units past the lower endpoint or 3 + 1 = 4. The dividing point is 4.
2) Use the midpoint formula:
((x1 + x2)/2, (y1 + y2)/2)
points (4, 2) and (-2, 8):
((4 - 2)/2, (2 + 8)/2) = (1, 5) midpoint
3) Use the distance formula:
d = SQR[(x2 - x1)^2 + (y2 - y1)^2]
given points (-4, 3) and (2, -1):
d = SQR[(2 - (-4))^2 + (-1 - 3)^2] = SQR[36 + 16} = SQR(52) = 2SQR(13)
No time to do #4, sorry. This is explained here:
www.purplemath.com/modules/parabola3.htm
