Mathematics - 17 October 2007

Don't the 3 angles of all triangles add up to 180 degrees? My friend said 360.. but I don't know, that doesn't sound right...

2007-10-17 11:23:48 · 16 answers · asked by Anonymous

Draw the figure on a coordinate plane, find perimeter.
L (0,1)
M (3,5)
N (5,5)
P (5,1)

2007-10-17 11:20:07 · 2 answers · asked by SPFN9 2

using fence as axis of symmetry, what is quadratic function that models ball's height????????????????????

2007-10-17 11:17:30 · 3 answers · asked by [xo♥ox] 1

hi i have homework and im really stuck on these 3 math questions, the others i got perfect except for these. these 3 math equations are two step equations.

-2k divided by 7 = 36. 5 + r divided by -2 = -6
and
f - 6 divided by 5 = 3.2 thanks for helping!

2007-10-17 11:11:05 · 3 answers · asked by fsurulezzz 1

Prove the above logical equivalence using the laws of logic also state the laws their detail to understand for a new one with each statement form, please. (this is question of discrete math)

2007-10-17 11:07:36 · 2 answers · asked by sameerg 1

The length of a rectangle exceeds its width by 4 feet. If the width is doubled and the length decreased by 2 feet, a new rectangle is formed whose perimeter is 8 feet more than the perimeter of the original rectangle. Find the dimensions of the original rectangle.

2007-10-17 11:00:57 · 6 answers · asked by River 4

Please show work!!! lol

2007-10-17 10:54:25 · 5 answers · asked by Anonymous

2007-10-17 10:53:18 · 4 answers · asked by Anonymous

Find a value for k so that the line through (4,k) and (-2,-1) is parallel to y= -2x+ 3 over 2.

Please show work and thanks!

2007-10-17 10:51:41 · 1 answers · asked by donutss 1

Please... okay....

A batting average is the ratio of baseball hits to at-bats, expressed as a decimal. If a player with 540 at-bats has a batting average of 0.350, how many hits did the player make?

please smart people.......

2007-10-17 10:51:30 · 17 answers · asked by hey 3

Is the above statement true or false?

2007-10-17 10:51:02 · 5 answers · asked by Pinsir003 3

A zip line is a taut rope or cable that you can ride down on a pulley. The zip line at the right goes from a 9 foot tall tower to a 6 foot tall tower. The towers are 20 feet apart. What is the slope of the zip line?

Please show your work and thank-you for your time!

2007-10-17 10:49:19 · 8 answers · asked by donutss 1

F - (kx) = a[(kx)/b)]

if you could give a step by step breakdown on how in the world you solve for "x" i would be more then grateful.

Thanks!

2007-10-17 10:47:45 · 3 answers · asked by jerseyshore man 2

A triangle has sides of length 5 and 6 units. The length of the third side is x unites, where x is and integer. What is the largest possible perimeter of the triangle...
explanation please........... 1st good answer gets 10 points.

pce

2007-10-17 10:46:51 · 1 answers · asked by Anonymous

1. (8b^3/c^3)^2(b^2c/4)^2

2. (12a^-2b^-2c^6/36a^-2c^7)^-3(a^-2b^5/3b^4c^3)^2

2007-10-17 10:42:33 · 1 answers · asked by ..... 1

and why...

2007-10-17 10:39:35 · 4 answers · asked by . 4

2007-10-17 10:37:51 · 4 answers · asked by jenna28336 1

For the following problem, we are asked to find dy/dx, [d^2 * y] / [d * x^2], and to state for which values of t is the curve concave upward.


1. x = t^3 -12t, y = t^2 – 1

(the first equation reads as x equals t cubed minus 12t; the second equation reads as y equals t squared minus 1).

For this problem I got:

2t / [3t^2 – 12] for dy/dx;

[-6t^2 – 24] / [(3t^2 – 12)^3] for [d^2 * y] / [d * x^2];

after setting [d^2 * y] / [d * x^2] equal to 0 I had:

6t^2 + 24 = 0, and thus t^2 = -4;

Assuming I did all of this right so far, does this mean that the function does not concave upward anywhere because the square root of negative 4 is a non-real answer, or does is still concave up somewhere? Please explain which is the case and why, and if I did something wrong earlier in the problem (i.e. an algebraic error somewhere), please explain how to do the problem step-by-step.

2007-10-17 10:29:53 · 1 answers · asked by Ryan_1770 1

how do i do it???

plzz help mee

tanx

2007-10-17 10:22:28 · 13 answers · asked by -x-lollie-x- 1

and is this equation a function...
x^2+5 and if so why??

2007-10-17 10:19:27 · 3 answers · asked by . 4

Warren is 14 years older than Chuck.
Next year Warren will be 3 times as old as Chuck.
How old is Warren?
I got : Warren=X+14 then i'm stuck...

2007-10-17 10:12:50 · 12 answers · asked by persevere 2

Having trouble solving this problem

0.35y+0.65(10-y)=0.45(100) .

2007-10-17 10:08:17 · 11 answers · asked by Catus JAck 1

tan(theta)-sin(theta)=4/9

solve for theta

I feel like I should know this but am stuck. I even know the answer from Maple, but can't figure out the process.

2007-10-17 09:52:55 · 1 answers · asked by Voodoo6969_98 2

what are rationl/irrational number. and what are complex numbers and what are imaginary numbers?
i am so cunfused.

2007-10-17 09:50:49 · 4 answers · asked by Anonymous

no calculators or writing, i can tell if you do

2007-10-17 09:45:03 · 6 answers · asked by kiser_alex 2

A car is traveling at night along a highwa shaped like a parabola with its vertex at the origin. The car starts at a point 100 m west and 100 m north of the origin and travels inan easterly direction. There is a statue located 100 m east and 50 m north of the origin. At what point on the highway will the car's headlights illuminate the statue?

what i have so far:
y'(x)=m=(50-y)/(100-x)
delta x=100-x
delta y=50-y
delta y=f(x+deltax)-f(x)
=50-y=100-x
y'=1
y=x-50

I dont no how to finish the problem off so and i feel like i am going in circles, so any help would be great! Thanks!!!!

2007-10-17 09:39:04 · 3 answers · asked by jellybean0424 2

2007-10-17 09:35:11 · 4 answers · asked by jessica r 1

If tile for your kitchen is buy 1 sq ft get one free, and you had to do the whole floor what would be the cost of the Kitchen Floor?


This is really easy so first to get this gets 10 points.

2007-10-17 09:34:21 · 11 answers · asked by Anonymous

Suppose the average costs of a mining operation depend on the number of machines used, and average costs, in dollars, are given by C(x) = 2900x + 1,278,900/x , where x is the number of machines used.
Find the critical numbers of C(x).
Use the Second Derivative Test to determine the critical number that gives a local minimum.
What is the minimum average cost?

2007-10-17 09:27:33 · 1 answers · asked by jessiebabie824 2

I have to find the horizontal asymptote:
g(x)= -2x+3 / 3x+1

and the vertical asymptote of:
g(x)= x+3 / x(x-5)

Any help is appreciated!

2007-10-17 09:23:22 · 4 answers · asked by Anonymous