Math Help

Archive for June, 2007

Question: MATH homework need help?

please help me with my homework..10 point for best answer
1.Mario and Maria each earn $10 and hour at their summer jobs. if mario workds 3 3/4 hours and maria works 1 1/2 hours. How much did they make together??
2.The raiders won 2/5 games over the last two seasons.if they play 40 games in the last two seasons, how many did they win?
3.simplify (8×10^7)x(5×10^6)
4.the Area of a Circle is 16 pie. what is the diameter of the circle?
5.five people equally share 2/3 of a pizza.as a fraction, what percentage does each person get of the whole pizza?
THANKs!

Answer: 1. 3 3/4 hrs@ $10/hr
=3.75 X 10, =37.50

1 1/2 hrs@10/hr
=1.5 X 10, =15
Total=37.50 + 15.00, =52.50

2.2/5 of 40=2/5 X 40, =16

3.(8×10^7) X (5×10^6)
=8 X 5 X10^7 X 10^6
=40×10^13
=4 X 10^1 X 10^13
=4×10^14

4. Area=(pi)R^2
16(pi)=(pi)R^2
(16)(pi)/(pi)=R^2
4=R
Therefore 8=D, since the diameter is twice the radius

5. The whole pizza is 100%
2/3 is 2/3 X 100, =66.67%
That 66.67% is divided 5 ways
66.67/5=13..33%

Math Games & Lessons : The Importance of Homework

Question: Organizing the papers/work kids get home?

Does anyone have any ideas on how to orgranize the papers/work (Lang Arts, Math, Writing etc) that my 1st, 3rd graders get home every Friday? I’ve tried the 1 inch binder, but looking for any other options? Sometimes the sheets are a little big and get squished when put in binder.
And for some reason, my generally responsible kids just hate doing it themselves…

So, the question is how to organize kids school work so it can be looked thru later. This is about 30-40 sheets a week (Including homework, school work, art…) I’ve already tried the 1inch/ 3 inch binder idea last few years. Any other ideas appreciated.

Answer: Have you tried the folders with a pocket?
The printer paper fits and stays pretty neet.

Math Worksheets / Times Tables Taking Over The World

Question: Can somebody please help with these math question?

Can anyone provide an example of how we find the discriminant? For example, how would we find the discriminant of a quadratic equation like: 2x^2 – 3x + 4 = 0?

Answer: b^2-4ac
which is
-3^2- 4(4)(2)
9-32
-23
which means there are 2 imaginary numbers or no real numbers

Algebra 2 – The Discriminant of a Quadratic Equation