Mathematics

Conditional probability question

Go to the link to view the problem http://i51.tinypic.com/s0yipc.png-90/200 = 9/20 = .45 D. .45-Hmm not sure

Math problem. Please help!!

DEF is a right triangle with hypotenuse DF. DE = 6 and EF =8. If Y lies on DF and EY bisects angle DEF, find DY.-Because the sides are 6,8, we know its in the form of a 3,4,5 triangle. So the hypotenu

Can someone please help me with this ODE, its for my exam tmoz and im losing it

consider the differential equation x^2 (dy/dx)= x^3+3(x^2)y+x(y^2)......................… make the substitution u=y/x to reduce it to x(du/dx) = 1+2u+u^2................................… solve eq

Question about dividing exponents

X^3 -16x^2 +64x -------------------- x^3-8x^2.I know the answer is x-8 over x but how do they arrive at this?-(x^3 -16x^2 +64x)/(x^3-8x^2) = x(x^2-16x+64)/x(x^2-8x) = (x^2-16x+64)/(x^2-8) = (x-8)^2/(x

Find the equation for the line that passes through 5he point (5,1) and is perpendicular to the line x-3y+16=0

please show steps. Any help appreciated!--3y = -x - 16 y = x/3 + 16/3 slope = 1/3 slope of perpendicular line = -3 y - 1 = -3(x - 5) y - 1 = -3x + 15 y = -3x + 16-The line x-3y+16=0 has a slope =1/3

Solve x^3 - 6x^2 = 0

How do I solve this?-The first thing that you want to do when solving these, is to factor out as much as you can. Basically, everything that these two numbers have in common, factor out. In this case,

Solve the following separable differential equation

dy/dx = 1+y^2 Find the particular solution (ie. y = ...)-rearrange as x = integral (1/1+y^2) dy x = arctan y y = tan x Check:- dy/dx=sec^2x=1+tan^2x=1+y^2-Differential= 2y Integral =x + (1/3)y3

Simultaneous Linear Equations

Got this question on an assignment, not asking for homework answers or anything but... 21x + 12y = 84 7x + 4y -28 = 0 it seems like the same equation, so how do we solve it, or answer it? Thanks.-You

Solve: a. square root of 0.01 + square root of 0.0064 b. square root of 0.003 + cube root of 0.000125

Please answer this...its important for me! Thanking You!-The Question is a)√0.01+ √0.0064 √0.01 = 0.1 √0.0064 = 0.08 Putting respective values = 0.1 + 0.08= 0.18 b) √0.003+³√0.000125 √0.003= 0

Can you prove this trigonometric equation

3sin(x+(1/3)Pi) = sin(x)+2sin(x+(1/3)Pi)+cos(x+(1/6)Pi) I am sure it is true, they both have the same graph and my Maple 14 software tell me it is true when I issue validity check command. I just wa

How do you differentiate this simple problem:

f(x) = 1/ (x^x) first derivative please, with working!-... f(x) = 1/ x^(x) or y = x^(-x) or ln(y) = -x ln(x) or 1/y dy/dx = - ln(x) - 1 or dy/dx = - y ( ln(x) + 1 ) or dy/dx = - ( ln(x) + 1 ) / x^(x)

A student finishes the first half of an exam in 2/3 the time it takes him to finish the 2nd half.

if the entire exam takes him an hour, how many minutes does he spends on the first half of the exam.-Equation: 2/3x+x=60 min. 5/3x= 60 min. x= 36 min. take 2/3 of 36 It takes him 24 minutes.-Lets

Help me solve this complex number

(x - 2i)/(2 + i) + (2 - iy)/(1 - i) = 4-2i Pls show a step-by-step working please. Thank You!-Tackle the fractions separately: (x - 2i)/(2 + i) = (x - 2i)(2 - i)/((2 + i)(2 - i)) = (2x - 4i - xi - 2

Calculate the volume occupied by 2.0g of Ne at 50C and 1.5 atm of pressure.

I am having a hard time figuring this one out.. do I just do PV/RT? (AW=14.01; O=16.00) PLZZZ HELP! Thank you! This is a practice problem for a test I have coming up.. I just need to know to solve thi

Need help with algebra problem solving

1. It is known that making 1 lb of honey requires 20,000 trips by bees to flowers to gather nectar. How many pounds of honey would 55,000trips produce? 2. A particular hybrid car travels approx 260 m