Mathematics

Derivative Question-Calculus!

derivative of x*y^3 = cos(7x+5y)-xy^3 = cos(7x + 5y) x * (3y^2 * dy) + y^3 * dx=-sin(7x + 5y) * (7 * dx + 5 * dy) 3xy^2 * dy+y^3 * dx=-7 * sin(7x + 5y) * dx-5 * sin(7x + 5y) * dy 3xy^2 * dy + 5 * sin(

How would you work this trigonometric identity out

tan x + cot x DIVIDE by csc x ?-Please clarify: Do you mean (tan x + cot x)/(csc x) or tan x + (cot x)/(csc x) ? The first one is (sin x)(tan x) + (cos x) The second one is tan x + cos x -+-+-After

Find the derivative of e^(2ln(x))

How would you find the derivative of e^2ln(x)? Im a little stuck.. Please show working/explain?-First, simplify e^[2ln(x)] by noting that: 2ln(x) = ln(x^2), by the laws of exponents. So, we have: e^[

6 month note dated April 15 find maturity

Find the maturity date for a 6 month note dated april 15.-October 15.

If f(x)=-2-6x, find x so that f(x)=-8.6

number 2- the pressure on a scuba diver at a depth of d feet is given by the function p (d)=64d+2112, where p (d) represents the total pressure in pounds per square foot. in feet, at what depth is the

Weighted Average help please???? [Thank you!!!]

Hi-- Could someone please help me with this? I am confused. Please explain so I can follow you. Thanks to all! =] Suppose Elizabeth is trying to calculate her grade in a math class. The course syllab

What is the tangent of pi

tan(pi) = 0-You need to know that tangent = sin / cos. You also need to know that in the unit circle, pi (this is in radian) can be converted into degree by multiplying pi by 180/pi.So pi is equivale

Numbers. Math Homework. HELP.

Im not exactly the smartest kid around buuuut I got this piece of homework where you have to write down the number form of what it says. so e.g. 15 thousand. youd write it as: 15,000 1 million youd

Math Question!!!!!!!!!!!!!!!!!

this is my problem A pizza place offers 4 different cheeses and 10 different toppings. In how many ways can a pizza be made with 2 cheese and 3 toppings? 660 680 700 720 ok so im supposed to take the

John, who is an amateur golfer, spends 2 hours every day practicing golf. What percentage of his waking hours

does John spend practicing golf if he sleeps 8 hours a day-if he sleeps 8, then he is awake 24 - 8 = 16 hours 2/16 = x / 100 16x = 200 x = 12.5 12.5%-24-8=16 waking hours. 2 (hours playing golf)/16

Math help please??? I'm very lost. Please explain so I can follow you! Thanks to all!

Hi-- I could really use someones help. I am really lost. Please explain so I can follow you. All help is greatly appreciated. Thanks! On September 7, Julie paid for her textbooks with her credit card

Radical equation 2x^2-5x-3=0

radical equation need help 2x^2-5x-3=0-First you have to factor 2x^2-5x-3 You should get (2x+1)(x-3)=0 Then you set (2x+1) equal to zero, and (x-3) equal to zero. (Because any thing times zero equals

Can someone please help me with this math problem

The problem is a trig problem(dealing with Sine,Cosine, and Tangent) A train is traveling up a slight grade with an angle of inclination of only 2 degree. After traveling one mile what is the vertic

How do you solve these 2 Algebra 2 problems?logs and natural logs

9^log9x=25 and 1/2lny-3lnx^2-9^log9x=25 Take logs of both sides log 9x log 9 = log 25 log 9x = log 25 / log 99x = 10^( log 25 / log 9)x = 1/9 *10^( log 25 / log 9)= 1/9* 10^1.46= 1/9 * 29.1= 3.24 a

Geometry help!! 10 points!! please help...

3. What is the length of line segment QR? http://www.flickr.com/photos/49010532@N05/5688217388/9.12 cm 10.36 cm 11.34 cm 12.61 cm-OK here goes tan80=QR/RS tan80=QR/2 QR=11.34cm points please:-)-QR