math help

[BrownieDDD]

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1. Determine the sets of points whose distances (-2,2) and (3,-3) are in a ratio of 2:3.

how do you do this?

2. Isoceles triangle have a length of 10. If the area is 48, what's the longest possible third side?
10
12
14
16
18

 

[Kahr]

1. Determine the sets of points whose distances (-2,2) and (3,-3) are in a ratio of 2:3.

how do you do this?

http://forums.studentdoctor.net/showthread.php?t=834110

2. Isoceles triangle have a length of 10. If the area is 48, what's the longest possible third side?
10
12
14
16
18

http://forums.studentdoctor.net/showthread.php?t=718225

Your answers are in the links below each problem, do a little searching next time. 🙂

 

[mk4]

I looked at their solution, and there's no way they intended you to actually solve the problem, it's way to long.

e - wrong because it just lists the semiaxes
c,d - wrong because their formulas are all jacked up. You'd have to do too much work to find the semiaxes and center.

So it's between a and b. But we know one of the points. We know that (0,0) is at a 2:3 ratio. That means that the circle must go through (0,0). And only b includes (0,0), which is found by finding the distance between the center of the circles and the point (0,0).