# 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**

u got the answer????

**life orientation**

poor service delivery

**ENGLISH**

TRADITIONAL AFRICAN MARRIAGE IS AN ADVANTAGE OF MAN ONLY NOT WOMEN

**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.

**Business**

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**

wil it work

**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