Recent content by Lurid

Homework Statement Eliminate the parameter: x=2-3θ y= 4+θ Homework Equations x2 + y2 = r2 The Attempt at a Solution [x=2-3θ]2; [y= 4+θ]2 x2= 4-12θ+9θ2 y2= 16+8θ+θ2 ------------------------------------- x2+y2 = 20 - 4θ + 10θ2 r2 = 20 - 4θ + 10θ2 Is there another...

Homework Statement Given the vector (6,-15) and foci (6,10) (6,-14), Find the equation of the conic.Homework Equations Vector = <6,-15> (x-h)2/a2 + (y-k)2/b2 = 1 Foci (h+c,k) and (h-c,k) vertices (h+a,k), (h-a,k) The Attempt at a Solution k = 6 h=-2 a=-12 I'm not sure what I'm doing. How do...

I'm still kinda confused. I have a cubic equation, but I can't simplify it any further. It also doesn't really make sense to me theoretically speaking, because how can you make a box that is 9 cubic feet with a 100 square feet sheet metal? Is it even possible? I'm still kinda convinced that my...

Homework Statement Suppose that you are the manager of a sheet metal shop. A customer asks you to manufacture 10,000 boxes, each box being open on the top. The boxes are required to have a square base and a 9 cubic foot capacity. You construct the boxes by cutting out a square from each...

It was a negative number, -2.77. I'll just ask my teacher tomorrow. :)

Thanks so much! I can't believe I couldn't catch that. I still couldn't get a correct answer though (well, it doesn't work because x=74).

Homework Statement A wire 60 feet long is cut into two pieces. Is it possible to bend one piece into the shape of a square and the other into the shape of a circle so that the total area enclosed by the two pieces is 100 square feet? If this is possible, find the length of the side of the...

Thanks! Oh, wow. I never though of it that way! That would have saved a lot of work, haha.

Thanks! Oh, wow. I never though of it that way! That would have saved a lot of work, haha.

Can anyone check my work? I'm doubtful of my answer. Homework Statement The bacteria in a 4-liter container double every minute. After 60 minutes the container is full. How long did it take to fill half the container? Homework Equations I used: F = A × 260 (1/2)F = A × 2x F...

The back of the book, apparently.

Homework Statement A store sells cashews for $5.00 per pound and peanuts for $1.50 per pound. The manager decides to mix 30 pounds of peanuts with some cashews and sell the mixture for $3.00 per pound. How many pounds of cashews should be mixed with the peanuts so that the mixture will...

Homework Statement Find the area of the paralellogram with vertices P1, P2, P3, and P4. *Not all pairs of vertices will give rise to a side. P1 = (1, 2, -1) P2 = (4, 2, -3) P3 = (6, -5, 2) P4 = (9, -5, 0) Homework Equations ||U X V || is the area of the parallelogram having U≠0 and...

Homework Statement u (dot) [ u x v] Homework Equations The Attempt at a Solution The answer is 0, but I'm not sure why. Do you simplify [u x v], then use that vector to dot it with u? Or can you distribute the u to both u and v?