Mathematics - 10 December 2007

Ok. Solve the logarithmic equation. round answer to 3 decimal places, if necessary.

1. log(x+1) + log(x-2) = log4

2. log(base of 5) (x+4) + log(base of 5) x = 1

I know the addition means multiplication, right? well I can't seem to factor it out right. But this is going to be graded and I really need to get a 100! So please help me, or atleast help me solve the equation to get the answer!

The first one my answer is 141.42, i really think i am major wrong with that one lol

And for the second one i got - 4

Thanks!

2007-12-10 16:52:58 · 4 answers · asked by yeahh 1

epicatechin is an antioxidant found in cocoa and cacoa type products. ORAC is the most reliable system for measuring antioxidant activity in food products and is measure as microM/g (more commonly known as Trolox Equivalents (TE)/g). i have found a chocolate to use in a food product that has the antioxidant content as epicatechin units (mg)

2007-12-10 16:48:40 · 1 answers · asked by Anneline 1

y= -x to the secfond poer + 4x + 2

A. (2,6)
B. (-2, -6)
C. (-2, 6)
D. (2, -6)

2007-12-10 16:42:26 · 8 answers · asked by Anonymous

2x3 -square root of 16+4x3^2/6-5

or, 2 times 3 minus the squareroot of 16 plus 4 times 3 squared divided by 6 minus 5.


im assuming you just do the order of operations. i know the answer is 3, but i cant figure out how to get it.
help me?

2007-12-10 16:28:33 · 4 answers · asked by Megabeth 3

y= 2 x to the second power + 4x - 2

2007-12-10 16:26:45 · 1 answers · asked by Anonymous

what percent is 64/125, 9/16?

2007-12-10 16:25:53 · 3 answers · asked by sonicsfan 1

2007-12-10 16:24:08 · 10 answers · asked by nikkiin00s 1

1) If the metric system is adopted for everyday use fabric will be sold in meters (not yards), milk in liters (not quarts), and meat in kilograms (not pounds). Given that 1 inch = 2.54 cm, 1 pint = 473.2 ml, and 1 pound = 453.6 g, what percentage increase does each of the following represent?
a) fabric: 1.00 meter instead of 1 yard,
b) milk: 1.00 liter instead of 1.00 quart,
c) meat: 1.00 kilogram instead of 2.00 pounds.

2) One cord of wood (a stack 4 ft high by 8 ft long by 4 ft deep) has a volume of 128 ft^3. What is the volume of 1 cord in m^3? One inch equals 2.54 cm exactly.

3) One gallon is 231 in^3. What is the volume of 1 gallon in cm^3? One inch equals 2.54 cm exactly.

2007-12-10 16:19:56 · 1 answers · asked by Math help me 1

13). Solve: -13 + 3e^x = 11

Show how you did it please

2007-12-10 15:56:14 · 8 answers · asked by Marcy 4

find a unit vector that is orthogonal to both i+j & i+k?

I know that the length is sqrt(a^2 + a^2 + a^2) = asqrt(3) but I don't know how to preceed to get the unit vector

2007-12-10 15:55:49 · 4 answers · asked by manutd84 1

you can mow a lawn in 3 hours. your friend can mow the same lawn in 4 hours. if the two of you work together, how long will it take to mow the lawn?

2007-12-10 15:39:45 · 4 answers · asked by Anonymous

Hey I need help on this problem:

81x^2 - 126x + 49 = 16

btw, I'm confused about how you fill in the first parentheses. My friend said to start the problem you first put (9x-7)^2 = 16 but where does the 7 and 9 come from? thanks.
20 minutes ago - 3 days left to answer.

2007-12-10 15:39:07 · 2 answers · asked by Anonymous

2007-12-10 15:38:02 · 12 answers · asked by mark f 1

How do you find out where the asymptote goes?

Example: y = 2x+3 / x+2

2007-12-10 15:36:24 · 3 answers · asked by myname_isalbert 1

What are the vertical asymptotes of the graph of f(x) = ln|x| / (x-1)

Options:
--x = 0
--x = 1
--x = 0 and x = 1
--There are none

2007-12-10 15:28:45 · 2 answers · asked by mercin5 1

2007-12-10 15:26:08 · 1 answers · asked by Ernest S 1

(10 + 2i) + (4 - 7i)
this is what i did..
=10+2i+4-7i
=14-5i
is that right?

and then..

(4 + 3i)(2 - 5i)
i FOILed it..
and got 8 - 20i + 6i - 15i^2
and then got 8 - 14i - 15i^2

thank you soooo much!!!!

2007-12-10 15:19:08 · 10 answers · asked by Anonymous

Here are the ones i need help with
1. write the equation of the line passing through the points (0,-1) and (3,7)
I would be much obliged if you could explain too.

2007-12-10 15:12:16 · 6 answers · asked by PLZHELP 1

use synthetic division to find p(3i)

2007-12-10 15:08:05 · 6 answers · asked by Anonymous

100 - 5Q + Q^2

Is the derivative -5+2Q ???

2007-12-10 15:02:30 · 2 answers · asked by pab 7

2007-12-10 15:02:25 · 3 answers · asked by mo 1

Used to show growth rate in US after 1970, I just need to know HOW to do the problem, not the answer. Need to learn the material.

2007-12-10 14:55:45 · 3 answers · asked by Joey B 2

I have seen some people using for example summation symbols (the capital case greek sigma) and other math symbols. How do you insert these symbols in "yahoo answers"? I have tried to use Latex commands, but it doesn't actually work.

2007-12-10 14:48:06 · 7 answers · asked by partalopoulo 2

The proof that it is all of them is the important part.

2007-12-10 14:47:46 · 3 answers · asked by oscarD 3

anyone know how to solve it using synthetic division?

2007-12-10 14:34:12 · 4 answers · asked by stricking 2

2007-12-10 14:34:03 · 2 answers · asked by Abena 2

i dont get this, please help me:

a store sells about 50 of a new model of dvd player per month at a price of $140 each. for each $10 decrease in price, about 5 more dvd players per month are sold. how much should the store charge in order to maximize monthly revenue? what is the maximum monthly revenue?

2007-12-10 14:33:41 · 4 answers · asked by Anonymous

a cheetah can run 177 km per hr so what is it's speed in meters per seconds??

help!!

2007-12-10 14:29:21 · 6 answers · asked by maddie 3

Often environmentalists capture an endangered species and transport the species to a controlled environment where the species can produce offspring and regenerate its population. Suppose that six American bald eagles are captured, transported to Montana, and set free. Based on experience, the environmentalists expect the population to grow according to the model
P(t)= 500/ 1+83.33e^-0.162t
where t is measured in years.
a) determine the carrying capacity of the environment
b)what is the growth rate of the bald eagle?
c)what is the population after 3 years?
D)when will the population be 300 eagles?
e)How long does it take for the population to reach one-hhalf of the carrying capacity?

2007-12-10 14:21:43 · 7 answers · asked by star baller 360 5

Find the formula for a parabola with its vertex at (2,7) and with a second derivative of -4.

Find the formula for a function of the form y = A\sin(Bx) + C with a maximum at (3,6), a minimum at (9,-4), and no critical points between these two points.

Find the formula for a function of the form y = be^{-(x-a)^2/2} with its maximum at the point (0,8).

Find the formula for a quartic polynomial whose graph is symmetric about the y-axis and has local maxima at (-3,5) and (3,5) and a y-intercept of 2.

I am so confused. My math professor is horrible. I have no idea how to do these problems. I have looked in my book and I have asked other people and we cant figure out how to do these. PLEASE EXPLAIN!!! Thank you so mcuh!

2007-12-10 14:20:02 · 1 answers · asked by Jenny S 2