Mathematics - 3 October 2007

prove that if lim f(c + delta x) = f(c) as delta x approaches 0, then f is continuous at c

2007-10-03 15:13:19 · 2 answers · asked by veni vidi vici 1

4x+5y=8
x=3y-15

2007-10-03 15:11:43 · 5 answers · asked by ALESANA 7

what is the perimeter of square abdc if the length of the diagonal ad = 5?

2007-10-03 15:06:29 · 5 answers · asked by Orville G 1

im new to this stuff so yeah, i need help.!
the problem is
7(3f-2g)+14(g-f)
oh yea show your work. lol
thanks.!

2007-10-03 15:04:23 · 2 answers · asked by K! 5

For the life of my I cannot solve this equation I know how, but the numbers are so hard to change them to get same coefficients that I always end with with x = 2.34523 and I am fairly sure that the variables equal whole numbers because this is a word problem about price per item.

equation:

1b + 100m + 16d = 435
3b + 18 m + 45d= 435
7b + 6 m + 46d= 435

Thanks for the help...

2007-10-03 15:02:09 · 6 answers · asked by tom_baer 1

2007-10-03 14:59:06 · 5 answers · asked by Anonymous

2007-10-03 14:54:46 · 1 answers · asked by the_goat4life 1

2007-10-03 14:54:33 · 8 answers · asked by Anonymous

write the prime factorization of each number. Then write it using exponents.
example- 18 2x3x3=2x3^2
i get how they got the answer but not how to find the rest.
36
40
90
is there a trick we aren't doing that is more simple?

2007-10-03 14:50:57 · 6 answers · asked by Dare to ask? 3

2007-10-03 14:49:42 · 3 answers · asked by helpless 1

2007-10-03 14:46:23 · 8 answers · asked by Anonymous

okay even my math teacher cant explain to me how a negative multiplied by a negative equals a positive

can anyone make real sense of that?

2007-10-03 14:25:38 · 13 answers · asked by Anonymous

or can they? it was a question on my functions test that i didnt get...

explain please :)

2007-10-03 14:01:28 · 1 answers · asked by mystery_girl07 2

Why does x^0 equal one? My math teacher said something about dividing exponents(subtracting)

2007-10-03 13:54:34 · 10 answers · asked by yellowducks 1

2007-10-03 13:46:16 · 9 answers · asked by joseph c 1

2007-10-03 13:38:45 · 2 answers · asked by Pep C 1

For a simple quadratic equation, let's say in standard for is simply
ax^2+bx+c=0. Why cannot this be rearranged to solve for a, b , or c
when you have 2 values such as "a" and "b", "a" and "c", or "b"
and "c".

Why doesn't the equation hold true when you are trying to rearrange
to solve for missing variables?!

x= -b+- sqrt b^2-4ac / 2a that is for solving x
Why doesn't it hold true if you do the following for other
variables:

To solve for b: b= -ax^2+c / x
To solve for a: bx+c / x^2
to solve for c: c= -ax^2-bx

2007-10-03 13:32:37 · 4 answers · asked by Anonymous

2007-10-03 13:23:58 · 3 answers · asked by Anonymous

Given that x = 3 * 10^6 and y = 1.2 * 10^9, find the value of each of the following, expressing your answers in standard form.

(i) x^2 - y

2007-10-03 13:17:11 · 1 answers · asked by Anonymous

There this question that has been on the quiz for a couple of time..and i miss it all the time. Please help and explain how can i solve these kind of problem.

An adult pass for a country fair cost $2 more than a children pass. When 378 adult and 214 children passes were sold, the total revenue was $2384. Find the cost of an adult pass.

2007-10-03 13:12:38 · 3 answers · asked by yue 1

There is this really hard homework problem that involves weighted averages. The question is:

A pinapple drink contains 15% pineapple juice. How much pure pineapple juice should be added to 8 quarts of the drink to obtain a mixture containing 50% pineapple juice?

Please tell me the answer and tell me how you solved it!!!

2007-10-03 13:10:40 · 3 answers · asked by charley c 1

please help me with that question, and how do you know if that is a permutation or a combination?
besides having order matter in a permutation and in a combination order not matter, what is another thing that is significant between them? i just cant tell the difference!

thanks in advance :D

2007-10-03 13:10:02 · 2 answers · asked by doppelganger; 2

For this problem I tried completing the square and then used trig substitution, but it doesn’t seem right because it forced me to have the lower limit of integration be arctan(2/3), which does not have one of the known exact values.

1. x dx / [x^2 + 4x + 13] (from 0 to 1; definite integral)

(which reads as x in the numerator, dived by x squared plus 4x plus 13 in the denominator).

2007-10-03 13:06:21 · 2 answers · asked by Ryan_1770 1

can someone tell me how to do problems like . . .

1.-3g + 9 = 15g - 9

2.4x + 27 = 3x + 34

3.10y = 2y - 6y + 7

4. 4 + 6x - 9x = 3x

5.13x + 8 + 8x = -9x - 22

6.5x - 3x + 4 = 3x + 8

these are so hard i have no clue what to do.

2007-10-03 13:04:09 · 8 answers · asked by Mike 2

C.D's cost 5.89 each including tax. Felicia bought more than one half (1/2) dozen C.D's but fewer than a dozen, what was her total cost? A 30 B 50 C 80 D 100

2007-10-03 12:36:02 · 4 answers · asked by bodigger 1

then x is equal to???


can someone tell me how to solve this problem? I am really confused.

2007-10-03 12:31:23 · 14 answers · asked by «~♥Emelie's Momma♥~» 2

2007-10-03 12:27:46 · 12 answers · asked by fpx 1

I need h ' (-3).

2007-10-03 12:24:14 · 2 answers · asked by jtaylor 1

Find the range of x/√(x^2-x-2) without using calculator.

2007-10-03 12:12:33 · 1 answers · asked by sahsjing 7

there are several problems, if anyone can help with all or any that would be greatly appreciated!
1. x^3-3x^2-x+3
2.x^6-2x^3+1
3. {x+4/x^2-x-2} - { 2x+3/x^2+2x-8}
4.(1/2 + sq root of 3i/2)^2
5.x^4+13x^2+36
6.2 - sq root of 5/ 2 + 3 sq root 5
7. (9/8)^3/2
8. -6/x+4
9. How many ounces of pure water should be added to 20 oz. of a 40% solution of muriatic acid to obtain a 30% solution of muriatic acid?
10. A motorboat maintained a constant speed of 15 mph relative to the water in going 10 miles upstream and than returning. the total time for the trip was 1.5 hours. use this info. to find the speed of the current.
11. In the 1984 olympics, Carl Lewis won the gold metal in the 100 meter race w/ a time of 9.99 seconds. 1896, Thomas Burke won the gold metal in the 100 meter race in 12.0 seconds. If they ran the same race, repeating their respective times, by how many meters would Lewis beat Burke?


THANK YOU GUYS SOOO MUCH!!!!

2007-10-03 12:06:57 · 3 answers · asked by shortycowgrl101 1