Mathematics - 14 October 2007

2007-10-14 19:11:29 · 4 answers · asked by futbolxavi_07 1

Question: [H+] = 1.9x10^-6

pls help out, i have a few of the similar question, but no idea how to work it out. pls show me the wrking out. THX HEAPS

2007-10-14 19:07:20 · 1 answers · asked by Anonymous

arcsin(3/4) basically means sin^-1(3/4) right? in my book the answer is .84806... and on my calculator it's 48.5904? what am i doing wrong? (im using a TI-89 btw)

2007-10-14 18:59:58 · 3 answers · asked by WOOOT 2

Use the intermediate value theorem to show that there is a root of the given equation in the specified interval.

2007-10-14 18:59:01 · 3 answers · asked by helix.helix 2

I know that a cosine function isn't a polynomial, but I can't seem to name any specific reasons why. Please help!

2007-10-14 18:58:31 · 6 answers · asked by Jess 2

Would someone mind giving me a hand with this one! Thank you so much!

(15x - 5y) (17x -21y) Mulitply

2007-10-14 18:56:52 · 6 answers · asked by Anonymous

How do you add fractions with different denominators? You have to cancel them down or something...?? Plz help!!!! Thanks x

2007-10-14 18:52:52 · 8 answers · asked by breathfromanother 4

Need some more Algebra Help if anyone would mind helping a girl out.

Thanks!

Find the x-intercepts. y = 2x^2 - 9x + 1

2007-10-14 18:52:47 · 1 answers · asked by Anonymous

2007-10-14 18:44:57 · 4 answers · asked by Anonymous

Could someone give me a hand with this one. Thank you so much!

Solve.

√x - 1 = x - 3

2007-10-14 18:43:45 · 5 answers · asked by Anonymous

A particle is traveling along the x-axis. Its initial position is 20 meters to the right of the orgin and its final position is 125 meters to the right of the orgin. The particle travels from 20 meters to 65 meters at a velocity of 15 meters/second and from 65 meters to 125 meters to the right of the orgin at a rate of 60 meters/second. Find the average velocity of the particle as it travesl from its initial position to its final postion.

2007-10-14 18:43:22 · 4 answers · asked by lance3223 1

Prove the formula for this:
1^2 + 2^2 + 3^2 + ... +n^2

2007-10-14 18:38:13 · 2 answers · asked by Anonymous

the computer club sells 50 more than three times the number the chess club sells. the computer club sells 134 pins. How many pins does the chess club sell?

2007-10-14 18:37:10 · 7 answers · asked by tonee12004 1

A movie ticket for an adult cost $8, and a child's ticket cost $5.50. One adult is taking a group of children to the movies. she has $35.00. How many children can she take with her to the movies?

2007-10-14 18:35:07 · 11 answers · asked by tonee12004 1

You wan tto go to Africa for a photo Safari. You need $2,800. you get 1,000 from savings and your family and you can save the $30.00 per week. How amny weeks will it take you to save up for the trip?

2007-10-14 18:31:59 · 4 answers · asked by tonee12004 1

Word problems I'm not so good with anyone want to give me a hand I would greatly appreciate it.

A farmer in Texas is building a fence in the shape of a right triangle around some of his property. He knows the two shorter sides to be 9 ft. long and 10 ft. long. If the farmer must pay $10 per foot of wood, how much will he need to spend on the longest side of the fence? Round your answer to the nearest dollar.

2007-10-14 18:31:52 · 2 answers · asked by Anonymous

2007-10-14 18:14:30 · 5 answers · asked by sexyhooper55 1

2007-10-14 17:57:27 · 4 answers · asked by Anonymous

the problem is this:

Solve the equation by completing the square(^2=2 squared)

4x^2-12x+1=3 ,the answer that i got is x= plus or minus sqrt11 over 2 +1.5, is that correct?

2007-10-14 17:47:04 · 5 answers · asked by Anonymous

the problem is 1-i over 1+i, the answer i got is one, is that right?(seems too easy thats why im asking)

2007-10-14 17:43:22 · 3 answers · asked by Anonymous

(1/y + 2) / (7/y - 2)

2007-10-14 17:39:07 · 9 answers · asked by Jay-j 2

(8) / (b/w - w/b)

2007-10-14 17:36:51 · 4 answers · asked by Jay-j 2

comparing the small soda bottles to the big one...

2007-10-14 17:29:46 · 6 answers · asked by Anonymous

please reply back asap

2007-10-14 17:25:18 · 8 answers · asked by Anonymous

does anyone know how to find the centroid of a triangle by drawing the three medians? i think you have to use a compass and protractor or something and i'm not sure how to do it this is due tomorrow and its almost one in the morning and i'm really screwed if i don't get it done

2007-10-14 17:24:09 · 3 answers · asked by matt w 1

You have to find all the roots. I'm not good in math.

2007-10-14 17:21:02 · 4 answers · asked by Jessica W 1

= ( I need some more help. I'm going to the school on Monday so I can get a tutor but if someone can please help me in the interim I would greatly appreciate it.

Solve by using the quadratic formula.

2x^2 = x + 6

2007-10-14 17:20:32 · 5 answers · asked by Jane S 1

Let f(x) = (x^2) - 5x and find the linear approximation L(x) to f at x=6. Solve the equation L(x)=0

2007-10-14 17:19:08 · 1 answers · asked by bradm_127 1

i need help on this problem, i got an answer, but im not sure if its true, what answer do you get?

Solve the equation by completing the square: ^2=2 squared

3x^2+12x-9=0

2007-10-14 17:18:31 · 6 answers · asked by Hello There 1

I'm so frustrated with this!! How do I subtract this problem?

5 / 64 - z^2 - 4 / z^2 + 9z + 8

2007-10-14 17:15:33 · 5 answers · asked by DoWHATiDO 3