Mathematics - 11 July 2007

Q12------------------How many isosceles triangles can be formed having integral sides ,such that perimeter is 22.
a. 10
b. 9
c. 8
d. 5

2007-07-11 16:39:33 · 5 answers · asked by Anonymous

Q21-------------------How many figures are required to number a book containg 150 pages.
a. 450
b. 360
c. 262
d. 342

2007-07-11 16:35:10 · 4 answers · asked by Anonymous

The function f is one to one. Find its inverse and check your answer. State the domain and the reang if f and f^-1.

f(x) = 4 / x+2

please help me and explain, I have other problems like this :)

thanks!

2007-07-11 16:20:11 · 4 answers · asked by Anonymous

(20) A squre is inscribed in a circle with radius r. what is the probability that a randomly selected point within the circle will not be within the squre?

A. π-2/πr squre
B. π-2/π
C. (π-1/2)/π
D. 1-r/π
E. r/π


(18) In rectangle PQRS above, what is a+b om terms of x?

A. 90+X
B.90-X
C. 180+X
D. 270-X
E. 360-X

(look at the picture i attached)

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please explain me!! thanx

2007-07-11 16:14:52 · 5 answers · asked by ashylnn 1

A triangle has sides 2x – 5, 3x + 1, and 4x + 2. Find the polynomial that represents its perimeter.

A) 9x – 2 B) (2x – 5)(3x + 1)(4x + 2) C) 10x – 8 D) 24x – 10

2007-07-11 16:13:23 · 4 answers · asked by Somebody 2

Identify "u"
integration formula

2007-07-11 16:13:00 · 3 answers · asked by Cantthinkofanickname 1

identify u
integration formula.

2007-07-11 16:11:30 · 4 answers · asked by Cantthinkofanickname 1

I have asked this question, yet i still don't understand?? please someone can you thoroughly explain it.

2007-07-11 16:10:17 · 3 answers · asked by Misbah 2

2007-07-11 16:01:41 · 7 answers · asked by rose 1

what is the sum of all real numbers?

2007-07-11 15:56:11 · 6 answers · asked by Jay 4

2007-07-11 15:52:41 · 12 answers · asked by Anonymous

Classify the following, if possible. 7x2 + 10xy + y2

A) Not classified B) Trinomial C) Monomial D) Binomial

2007-07-11 15:50:20 · 6 answers · asked by Somebody 2

Could x^2+5x+6.25 be simplified into a binomial?

2007-07-11 15:45:31 · 4 answers · asked by jumba 1

If 1.5 chickens lays 1.5 eggs in 1.5 days, how many eggs can 24 chickens lay in 24 days?

2007-07-11 15:43:27 · 8 answers · asked by Anonymous

Plane Trigonometry

2007-07-11 15:38:29 · 3 answers · asked by Peter 1

Which of the following is not a polynomial?

A) 24 B) 4x3 + 5x – 1 C) 2x – D) 3xy2 + xy

2007-07-11 15:30:22 · 3 answers · asked by cw21 1

f(x) = the integral from 0 to x

(t^2-49)/(1+cos^2t) dt

... at what value of x does the local max of f(x) occur?

What I have is... FTC1 lets me get rid of integration sign so all I have left is:

t^2-49)/(1+cos^2t

find the 2nd derivative to find the critical points and set it to 0.

I'm having trouble dealing with the trig functions what I have so far from the quotient rule is

f"(x)=0=((1+cos^2t)(2t)) - ((t^2-49)(-2costsint))

but then ok - when i figure out t - that will be.... what exactly? An inflection point right? But I'm looking for a maximum value. Hmmm... Ideas?

2007-07-11 15:22:51 · 2 answers · asked by Anonymous

I am not sure how to solve physics problems on my own, and this one especially baffles me. It is the following

1. A radioactive form of uranium has a half-life of 2.5x10^5 years.

what's the remaining mass of a 1.0g sample after t years


2. a tennis ball is dropped from a height of 10m. each time the ball touches the ground, it bounces up to about 45% of the max. heighut of the pervious bounce. determine its height after 5 bounces.


I want to impress the males in my class who think that girls can't be as smart so maybe they will accept me.

2007-07-11 15:12:40 · 3 answers · asked by orangegreenyellow 1

2007-07-11 14:58:19 · 3 answers · asked by lzhnyk 1

Find the derivative:

1. y=9x^4-5x^2+3x-4
My answer is 36x^3-10x-3

2. y=9x^(-1) - 3x^(-2)+13
Answer: -9x^(-2) +6x ^ (-3)

3. How do I find the derivative for

h(x)= 6/x^6- 5/x^5+ 4 Square root of x?

Thanks

2007-07-11 14:55:50 · 6 answers · asked by Anonymous

I missed class today and need someone to help me by explaining how to solve a rational formula for a given letter. For example my book shows a problem like this one:

y-b/m=x for : y

note: the / symbol is what I used to make it a fraction since I can't draw on this thing. Anyhow if anyone has some tricks on how to solve things like this it would help since the book only has three example with the same problem (which doesn't help at all!)

THANK YOU!

2007-07-11 14:49:39 · 7 answers · asked by natibiris 3

I'm trying to major in computer science, and I have yet to take a class (will take one in fall). I'm just wondering if it has logarithms from Pre-cal.

I think I LOVE logarithms!!! (:

2007-07-11 14:49:19 · 3 answers · asked by Anonymous

Which does not represent a possible intersection of a line and a right cone with height 4 cm?

here are the choices.
3 points
2 points
1 point
a segment

2007-07-11 14:29:54 · 4 answers · asked by Anonymous

1. A population, P, is increasing exponentially. At time t=0 years, the population is 35,000. In 10 years, the population is 44m 400.

a) Find the growth rate, b, in P(t) = a(b)^t. (note: lil t on top)
b) using the value of b calculated in part a), write an equation that models the population, P, after t years.
c) using your equation, find the population after 25 years.

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2. u want to buy a new car, u have investigated the trade in value of ur current car. three months ago, the trade-in value was 3200$. now it is 3125$- what will be the trade in value of ur car 6 months from now if it is depreciating exponentially.

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3. the temperature of a cooling liquid over time can be modelled by the exponential function: T(x) 60(1/2) ^x/30 + 20. (** 20 is not a little number lol whatever they are called**). where T(x) is the temperature, in degrees Celsius, and x is the elapsed time, in minutes. determine the temperature after 2 hours.

2007-07-11 14:29:50 · 1 answers · asked by orangegreenyellow 1

Describe the locus of all points that are 3 cm from a point m.
choices->
a line, 3 cm from line m
a pair of parallel lines, each parallel to and 3 cm from line m
a sphere with a radius of 3 cm
a circle with a diameter of 6 cm

2007-07-11 14:27:25 · 5 answers · asked by Anonymous

2007-07-11 14:25:42 · 6 answers · asked by lzhnyk 1

please help me.

2007-07-11 14:22:43 · 6 answers · asked by Anonymous

Let M be the set of all even numbers from 1 to 25 and all the odd
numbers between 26 and 200.

If all the elements of M are multiplied , find the number of zeros at the end of this product.

(1)22
(2)18
(3)23
(4)21

2007-07-11 14:19:34 · 1 answers · asked by sanko 1

A dealer bought a phonograph for P160.00. For how many pesos must he mark it so that after deducting 10% of the marked price he may sell at a profit of 12-1/2 % of the cost.

2007-07-11 14:18:07 · 2 answers · asked by jonathanaljomargonzales 1

Clerk F files a certain quantity of cards in 2 1/2 hours. Clerk G can do the work in 3 hours. At these rates, in how many minutes can Clerk F file alone for 2 hours ?

2007-07-11 14:13:55 · 1 answers · asked by jonathanaljomargonzales 1