Mathematics - 18 August 2007

Quickly Please

2007-08-18 10:17:42 · 8 answers · asked by SOfTbAll CHiCky_12 2

These things are confusing.

Can someone answer these questions?

1. Using two different instruments, I measured the length of my foot to be 27cm and 27.00cm. Explain the difference between these two measurements.

2. I can lift a 20kg weight over my head ten times before i get tired. write this measurement to the correct number of significant figures.

3. Why are there 3 sigfigs in 5.40 and only 1 in 3000?

I'd like to know WHY for these questions, too. im kinda confused....actually really confused. thanks.

2007-08-18 10:12:33 · 10 answers · asked by Anonymous

the possible answers are n to 6th power - 3n to 5th power + 6n squared + 12, 15n to 7th power, nto 6th power - 3n to 5th power + 17n squared + 48, or n to 6th power - 3n to 5th power + 6n squared +48. I know this sounds difficult; but I am typing and it is hard to take a number to a certain power. I am not sure what key to hit. If there is any answer to this problem and if anyone can help me with squaring on a computer or to a certain power, I would appreciate it. Thank you

2007-08-18 10:09:18 · 4 answers · asked by carole bostic 1

2007-08-18 09:57:07 · 13 answers · asked by awesome_jarrett7 2

f(x) x^2+x-6 Solve F(x) > 0

X^2-3x+2x-6
X(X-3)+2(x-3)
(x+2)(X-3)

X E (-oo,-3)U(2,oo)

So my question is why is it -3 and 2 instead of -2 and 3. when it is -2 or 3 that would make (x+2)(X-3)=0

2007-08-18 09:54:04 · 3 answers · asked by roguetrader12002 4

the sum of three consecutive odd integers is 57 what are the integers????

How would i find the inverse function of f(x)=3x-4
is the inverse a function and why?\

what is the remainder when you divide (x^3+2x+1) by (x-3)

2007-08-18 09:49:34 · 4 answers · asked by Anonymous

please show me how to work this problem

2007-08-18 09:48:07 · 4 answers · asked by Anonymous

Find:

f(x+Δx) - f(x) / Δx if f(x)= 8x^2+1

2007-08-18 09:40:19 · 6 answers · asked by NEpatriots12 2

also not sure on these....
An employee who produces x units per hour earns an hourly wage of y = 0.50x + 11 (in dollars). Find the hourly wage for an employee who produces 11 units per hour.
find the slope of the line passing through the points (-7, 4) and (8,4)
find the slope of (0,3)

2007-08-18 09:34:02 · 6 answers · asked by Anonymous

the trinomial is 3x ²– 5x + 2
i keep getting the answer (2x+3)(x+1) but when i multiply it out to check i always get 2x ² +5x+3
help?

2007-08-18 09:28:23 · 8 answers · asked by Izzie 2

What are the actual dimensions (in centimeters) of a cube containing 100 litres?

2007-08-18 09:05:14 · 3 answers · asked by Anonymous

can some one help me with this problem

2007-08-18 08:43:44 · 3 answers · asked by Anonymous

2007-08-18 08:42:59 · 5 answers · asked by faby 1

I can't figure out how to fix this. When I punch in an equation it makes it bigger. I just want the answer. Also if I punch in sqrt(30) it says the answer is sqrt(30). If I punch in PI2 it gives me PI2.

How do I get it to give me numbers?

2007-08-18 08:41:33 · 3 answers · asked by Ryan N 2

can some one help me with this problem

2007-08-18 08:41:20 · 6 answers · asked by Anonymous

in case you couldn't understand, the full question is: the angle of elevation of a monument is 53° when measured from a point on the ground 35 m from the base of the monument. find the height of the monument.
i also need to know how to work this question...

2007-08-18 08:39:46 · 5 answers · asked by camille l 1

I need help in factoring this problem

2007-08-18 08:37:43 · 3 answers · asked by Anonymous

hey can someone help me with this math problem please 'm not good with these kind of problems

A company produces a toy for which the variable cost is $12.30 per unit and the fixed costs are $98,000. The toy sells for $17.98. Let x be the number of units produced and sold.

(a) The total cost for business is the sum of the variable cost and the fixed costs. Write the total cost C as a function of the number of units produced.

(b) Write the revenue R as a function of the number of units sold.

(c) Write the profit P as a function of the number of units sold. (Note: P=R-C.)

2007-08-18 08:37:17 · 3 answers · asked by devincr 1

Find x:

ln(x+5) = ln(x-1) - ln(x+1)

i have no idea where to start! i knew at one point but its been a year or so and i forgot

2007-08-18 08:35:07 · 3 answers · asked by ksv 1

If sin x = .57, then what does sin (pi - x) =? I keep getting -.524, but I'm told that that is wrong! How do you solve this????

2007-08-18 08:31:44 · 2 answers · asked by Anonymous

i need ot know how to work this problem. the two on the first x is x squared. so is the -2 outside of the parentheses. sorry it wouldn't let me show the problem like that

2007-08-18 08:27:54 · 2 answers · asked by camille l 1

Find X:
log3(-9)=x <---that is log base 3. I can't do a little 3.

2^x=3

2.43 times 10^x = 1.84

Also, What is the range of the function f(x)= -|x+3|-2

Thank you soo much!!

2007-08-18 08:20:30 · 1 answers · asked by ksv 1

2007-08-18 08:15:45 · 9 answers · asked by faby 1

Question 20 (Multiple Choice Worth 4 points)

Factor the polynomial x2 + 6x – 27. Which one of the following is a factor?

(x – 9)

(x + 3)

(x + 9)

(x + 6)



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Question 21 (Multiple Choice Worth 4 points)

Factor the polynomial 15x – 3xy + 20 – 4y by grouping.

3(5x – 3y) + 4(5 – y)

(3x + 4)(5 – y)

(3x – 4)(5 + y)

Prime



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Question 22 (Multiple Choice Worth 4 points)

Solve the given equation by using the quadratic formula.

x2 – 5x – 3 = 0

What value is under the square root (or radical) in your answer? (Note: You are asked to identify only the value under the radical, not the solution to the equation.)

25

9

16

37



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Question 23 (Multiple Choice Worth 4 points)

Factor the polynomial ax + 2ay + bx + 2by by grouping.

(a + x)(b + 2y)

a(x + 2y) + b(x + 2y)

(a + b)(x + 2y)

Prime



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Question 24 (Essay Worth 4.0 points)

Use the following quadratic equation to complete parts a and b below. You must show all work.

x2 + 3x - 18 = 0

a. Solve by factoring.
b. Solve using the quadratic formula.

Question 25 (Multiple Choice Worth 4 points)

Factor the polynomial 12x2 + 11x – 5 completely.

(12x – 5)(x + 1)

(12x + 1)(x – 5)

(4x + 5)(3x – 1)

(4x – 1)(3x + 5)

2007-08-18 08:10:00 · 8 answers · asked by Anonymous

Verify that the following are identities:

(1+sinz)(1-sinz)= 1/sec^2 z <---that last part is one over secent squared z

2007-08-18 08:07:09 · 5 answers · asked by ksv 1

2x^2 = (sqrt of 3x) -1/2
2x^2 = 3ix -1/2
2x^2 -3ix=-1/2
x(2x-3i)=1/2

and

4=8x^-2 +x^-4
4=x^-2(8+x^-2)

these two problems are giving me trouble and i dont know how to go on from there..like finding the roots,i appreciate any help thanks

2007-08-18 08:04:32 · 3 answers · asked by Anonymous

2007-08-18 08:00:53 · 24 answers · asked by karam 1

This is from an SAT subject test (Math 1) online prep. I can't figure it out for the life of me! Please don't just tell me the answer, but also how you're supposed to figure it out!

http://i223.photobucket.com/albums/dd205/OkayThanksToYou/maththing.jpg

Thanks so much!! I'll pick a best answer TONIGHT!

2007-08-18 07:51:38 · 5 answers · asked by Anonymous

2007-08-18 07:49:25 · 11 answers · asked by ra16297845 3

the f and c are degrees of farhenheit and celsius, i really hav no idea wat to do, thanx for da help!

2007-08-18 07:37:51 · 4 answers · asked by Anonymous