School and Work

The problem is to subtract and simplify. . .

3 / (x^2+4x-5) - x / (x^2-1)

In the end I got . . .

(-x^2-2x+3) / (x+5)(x-1)(x+1)

If I'm wrong, can you show me how to do it please?
Thanks alot ! : )

View the original article here

Let z = the number of zebras and n = number of neons

then, for 9, z + n = 13 ==> n = 13 - z
also, 2.1z + 1.85n = 25.8 ==> 2.1z +1.85(13 - z) = 25.8
==> z(2.1 - 1.85) = 25.8 - 24.05 ==> 0.25z = 1.75 ==> z/4 = 7/4
==> z = 7 and n = 6

Similarly for the other

View the original article here

1. How long should you roast a whole ham that weighs 11 2/3 pounds? Is it.... 2 1/3 hours?
2. At what time should you put the ham in the oven if you want to eat at 5:20 P.M.? Is it ... 3:00 P.M.?

These problems I don't get:
3. How long should you roast a chicken that weighs 3 2/3 pounds?
4. At what time should you put the chicken in the oven if you want to eat at 5:45 P.M.?
5. How long should you roast a pork roast that weighs 3 4/5 pounds?
6. At what time should you put the pork roast in the oven if you want to eat at 6:30 P.M.?

CHART!
Meat--------------------------------Ti… (hour per lb)
Pork Roast-----------------------7/15
Ham--------------------------------1/5
Beef Roast-----------------------1/3
Beef Ribs-------------------------2/5
Chicken---------------------------1 3/4

View the original article here

http://img28.imageshack.us/i/ch111ac2.jpg/

i need to write the products, and the major and minor when necessary.

can someone check my answers? i dont need the answer, just to know if its right/wrong.

View the original article here