Math Help

Archive for August, 2010

Question: Online Math Tutoring Websites?

Hey, Could someone refer me to websites for online high school math tutoring? Would appreciate it if the website would be interactive with video chat or voice chat with online tutors to help solve problems.
Thanks in advance.

Answer: I am a tutor on ziizoo. I charge $15.00 and hour and would be happy to help you.On the website look for a Heidi Dommer

Math Tutoring- The Right Way

Question: Im feeling helpless…Open classroom frustration…any help for me?

Im working in an open classroom environment, and im NOT a teacher. I am a paraeducator, and im in the class to help the teacher with a certain student. The student has been diagnosed with autism. What I do in the classroom is i help the teacher with whatever she needs–i usually teach a center (which would be on the subject of science, math, art, geography, vocabulary, etc…) for the majority of my time, but i have trouble getting the children to stay on task, and i feel like i have nothing to motivate them to be on task. I can’t reward them with anything for doing anything right, and i can’t discipline them or have them disciplined for being off-task. i need i can say, “good job,” or “bad job,” but that only goes so far…what can i do, barring rewards and discipline, to get these kids to focus and learn? any websites or teachers that can help, please!

Answer: I think that if you are paid to help the autistic student that is what you should be doing, not the other stuff. Look at your job description!!

If you feel the open classroom is not the best environment for him (which is what I would be inclined to think) then I would contact his parent and call for an IEP meeting for a more appropriate placement. Good luck.

From a teacher in Tampa

Math Help with times table and multiplication

Question: Math Quadratics Help!!!!?

Please help with this quadratics question!
A farmer grows rutabagas in a field of 8 hectares, he could harvest the crop now and get 3t/ha which would sell for $200/t. Each week the farmer waits, the yield will increase by 0.3t/ha but the price will drop by $10/t.
When should the farmer harvest his rutabagas for maximum return?

I know i need to complete the square, but i need to find an equation for that question! so plz help me come up with an equation.
Thanks!!

Answer: Let x be the number of weeks the farmer waits.

The farmer can expect the yield to be (3 + 0.3x) t/ha.
He can expect the price to be (200 – 10x) $/t.

So his return will be
(3 + 0.3x)(200 – 10x) $/ha.

That is,
-3x^2 + 30x + 600 $/ha

This is a quadratic with negative leading coefficient, so it has an absolute maximum where its first derivative -6x + 30 vanishes. That is at x=5.

The farmer should harvest his rutabagas at 5 weeks.

Algebra Help – The Quadratic Formula – YourTeacher.com