# Posts by Edward

Total # Posts: 374

Math
As the candle burns,its length decreases at a rate of 2cm every 20minutes. Write down the equation to calculate the length of the candle

math
The scatterplot shows the number of minutes spent reading (x) and the number of pages read (y) by each of seven students last night. Use the labeled points to create a linear model that predicts the number of pages that a typical student reads in x minutes. Which equation ...

Maths
Find volume of solid generated by revolving around region y=x^(1÷2) and y=2,x=0 about 1)x=0 2)y=2

Physical
A cubical block of wood of side 0.5 m floats in water. Given that the densities of wood and water are 800 and 1000 kg/m3 respectively Calculate the depth of the block immersed in water.

Algebra
A tank is drained by two pipes.One pipe can empty the tank in 30minutes,and the can empty it in 25minutes.If the tank is 5/6 filled and both pipes are opened,in what time will the tank be emptied

Algebra
The cost of one hamburger and two large sodas is \$5.40. The cost of three hamburgers and one large soda is \$8.70. What is the cost of one hamburger?

Chemistry
addition of conc H2SO4 to Ph-CH(CH3)OH gives product?????

math
anyone able to solve my problem

math
no circumference=3.14(diameter)

math

life orientation
poor service delivery

ENGLISH

Vectors
a, b, c are 3 vectors such that |a|=2|b|=4|c| (|a|=modulus of a vector) and 2a-3b+6c=0 (a is a vector) then find cos(x) between a and b.

Biology Honors
Hardy-Weinberg: Within a population of birds, 21 percent of them display the recessive phenotype for a particular trait. What are the allele frequencies for this trait assuming the population is in genetic equilibrium? I'm absolutely confused on this ;l

Math
rekt

Maths
Lt (((1+×)^(1÷×))÷e)^1÷× x->0

Algebra
Find the intercepts if any x^2+y^2+8x-8y-49=0 EW1

Probability
The no. Of 5 digit no.s Such that sum of their digits is even is=

Probability
If no.s are srlected randomly then what is probablity to above question

Probability
From set of 20 natural no.s 2 are selected. find probability that their sum is 1.odd 2.even 3.selected pair is twin prime

algebra
Find the distance d (P1, P2) between the points P1 and P2 P1 = (−4, 4) ; P2 = (1, 6) d(p1,P2)= ____ (Simplify your answer. Type an exact answer, using radicals as needed.) qaz

algebra
Find the midpoint of the line segment joining the points P1 and P2 P1= (5,2) P2= (-4,3) The midpoint is _______ (Type an ordered pair. Use integers or simplified fractions for any numbers in the expression.) qaz

algebra
Find the equation of a line that is parallel to the line y = −3x and contains the points (9,−4). Y=______ (Type your answer in slope-intercept form.) qaz

algebra
Find the equation of a line that is perpendicular to the line y = 1/4x + 5 and contains the point (-6, 0) Y=________ (Type your answer in slope-intercept form.) qaz

algebra
Find the intercepts and use them to graph the equation. Y = x-7 qaz

algebra
A circle has the equation x squared plus y squared plus 8 x minus 8 y minus 49 equals 0 Graph the circle using the center (h,k) and radius r. Find the intercepts, if any, of the graph. qaz

Algebra
Solve the polynomial inequality and graph the solution set on a real number line. Express the solution set in interval notation x^3+x^2+16x+16>0 What is the solution set? (Type your answer in interval notation.) qaz

Binomial
sorry power 6 on bracket

Binomial
sooey there is power 6 on full bracket

Binomial
coefficient of x^4 in (3(x^2)-x+2)

algebra
Write the expression as a sum​ and/or difference of logarithms. Express powers as factors. log3(27x)

algebra
Solve the exponential equation. Express the solution in terms of natural logarithms. Then, use a calculator to obtain a decimal approximation for the solution. e^x = 20.9 What is the solution in terms of natural logarithms? The solution set is { }.

Algebra
Solve the logarithmic equation. Be sure to reject any value of x that is not in the domain of the original logarithmic expression. ln ã(x+4)=1 What is the exact solution? Select the correct choice below and, if necessary, fill in the answer box to complete your ...

Algebra
Find the domain of the composite function f◦g. Find the domain of the composite function f◦g. F(x)= 3/(x-3); g(x)= 2/x

Algebra
The population of viruses in an influenza culture after t hours is given by the function x(t) = 4et/2.5 The cost y in dollars for a new automated microscope to count x viruses in a sample is y(x) = ln 2x Create the composite function that calculates the cost y in dollars of ...

Permutation and combination
How many natural numbers are there with the property that they can be expressed as sum of cubes of two natural numbers in two different ways.

Michael
How many natural numbers are there with the property that they can be expressed as sum of cubes of two natural numbers in two different ways.

How do you calculate classical probability average

functions
sources said that differentiation of GIF is 0 but x in GIF is variable .and diff.of simple x is 1.?

Functions
Is {e^x} periodic function?

physics
the gravitational force on an object on the surface of the earth is F , what's the gravitational force on the satelite when at height R/20, where R is the radius of the Earth ?

Maths
What are conditions for taking |x*y|=|x|*|y|

Relations and Function
p (x)=x^6 a*x^5 b*x^4 c*x^3 d*x^2 e*x f

Differentitate:calculus
Differentitate:X^2.sinx/(x+1)(x^2-1)......???

Division:jus confuse
Find the remainder? when 2^2011 is divisible by 13

Rectangle
The length and width of a rectangle are integer.if the area is larger than its perimeter by 9 find the perimeter???

Trigonometry damon plz help
If the angle of a h meters long tower is in a straight line between two observers A and B angle of elevation of the top of the tower from A and B are alpha and beta respectively and AB=D meters find h/d

science
how many years will have to pass before only 3% of radioactive isotope is left if there is a half ye

Calculus using the first derivative
Y=e^x differentiate using the first principle

Algebraic word problem damon or steve plz interven it urgent
precious father is 5times older than his daughter precious and precious is twice as old as his brother mathew.in two year time the sum of there age wil 58 how old is precious nw

factorisation i need cerious itz too difficult
x^4+2x^2.y^2+y^4.......plz help

simultaneous equation very dificult need help itz urgent
A-C=B/2 A-B=C/6 B+C=32 find A,B,C

resolve the partail fraction and then integrate
resolve the partail fraction and then integrate.3x^2-34x+97/(x-5)^3

equation
yes reiny daz the question i jus decided to include bracket in it,reiny u got me confuse how come 3^x become 3^-x,but what if i use logarithm can it work?

equation
steve can logarithm work 4 dat

equation
9^x(-2)+3^3(x)=81 i need help

equation
i did not see dat jus it was a typo steve

equation
9^x(-2)+3^3x=81.... here is wat i did bt i go confuse (3^x)(-4)+(3^x)3=81 let 3^x=b b/4+b^3=81 multiply tru 4 b+b^3=81

word problem
12 is divided into two parts such that the product of the square of one part and fourth power of the other give a maximum,find the two numba

integral calculus
integrate. (1):sin2xcos3x (2):5(cos3x)^2

Equation
X^2-b(x-1)-1=0 find. (x)

equation on tangent of a curve need help
find the equation of a tangent of a curve at point(1,3) x^2.y^3+y^2.x^4+4x^2-14=0,i tried differentiate it n also applying this formula y=mx+b.bt i gt confuse

difficult physics i need help
calculate the relative permeability of an iron ring when the exiting current taken by the 600-turns of coils is 1.2A and the total flux produce is 1mwb.the mean circumference of the rings is 50m and the area of the cross section is 10cm^2?...

calculus
bt damon daz not the first priniciple

calculus
y=2^nx differentiate with respect to x using the first principle

critical maths problem need help!!!
show that any fuction y(t)=acosx+bsinx ,satisfied the differential equation y^"+wy=0 and also find the value of (a) and (b)

unda geometry cerious need help urgently
find the centroid of the area of the finite region enclosed by the curve y=x^(2)+1 when x-axis and the line x=0 and x=3

unda geometry
ok thanks steve,i will do just dat

unda geometry
but steve i don,t know it dat is why i posted it so that i can gt help from you guys to help me study further

unda geometry
find the centroid of the area of the finite region enclosed by the curve y=x^(2)+1, when x-axis and the line, x=0 and x=3

calculus: don't even no where to start from need help plz
i can do that 2x+4x=6x 6x=6x add -6x to both side 6x-6x=6x-6x 0=0 which automatically mean that all real no are the solution

calculus: don't even no where to start from need help plz
(1)find dy/dx of y if y=tan^(-1)1/x^2 (2) if y=3z^2.z^2 find dy/dz (3) if y=x^x show that dy/dx=x|n(x+1).. thanks

graphical geometry need help
the graph of the relation y=x^2+2x+k, passes through 2 and 0 find the value of k. plz explain

Trigonometry
Root3cosx nt root3cos

Trigonometry
Sinx+root3cos=1 if 0<=x<360

Integration
Integrate.1/root(2x-1)dx

Integration help
Integrate.1/root(2x-1)dx

algebra
If 192,x,y,3 form a geometic sequence, calculate the valuest of x and y.

sensitive probability plz help
i don,t know it that is why i ask for the solution

sensitive probability plz help
what about the (ii), (iii) ,(iv), (v)

sensitive probability plz help
These are the words that i have found so far (i)sort (ii)this (iii)shot (iv)host

sensitive probability plz help
it was a typo bt it is a (word) nt a letter,none it is hard dat is y i ask 4 the solution

sensitive probability plz help
yes (history)

sensitive probability plz help
(i):find the number of four letter words that can be formed from the letter history (ii):how many of them begin and end with a consonant (iii):how many contain the letter (Y) (iv):how many beging with (T) and end with a vowel (v):how many contain both vowel

logarithms maths
yap reiny n tanks

logarithms maths
logx+logx+n-logx/n.plz solve with explanation thanks

critical probability
in how many ways can be the first four letters of your name be arranged to form a three letter word, (i)when the letter can be repeated (ii)when the letter can not be repeated

damon
i don,t have much word to say bt tank you verymuch

damon or reiny need ur help God bless you
A rectangular face of a casting 250mmx100mm is to be machined on a sharper.if the average cutting speed is to be 20m/mins and the feed is to be 2mm/stroke,calculate the time taken to machine the face of the casting.Allow 5mm overrun at each end of the stroke

physics
scrol down a bit

physics
damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!!

physics
damon,reiny,steve,plz get a solution 2 my question plz it is urgent!!!

physics
qustion(1):A rectangular face of a casting 250mmx100mm is to be machined on a sharper.if the average cuting speed is to be 20m/min and the feed is to be 2mm/stroke,calculate the time taken to machine the face of casting.allow 5mm overun at each end of the stroke. question(2):...

maths
integrate. cos7xcos3xsinxdx.plz help tanks

maths
how did u got 27 and 72 i don,t understand

maths
A shop is sending out a bill for an amount less than #100.the accountant interchange the two digits and so overcharage the customer by #45,given that the sum of the two digits is 9.find how much the bill should be?.thanks

maths
integrate x^xdx.plz explain thanks

maths
tank you reiny

maths
resolve the partial fraction:x^3+6/x^2(x+3).with explanations thanks

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