# Posts by Joel

Total # Posts: 310

**Maths**

Could you please explain how you got 25 I'm really struggling to do this question

*March 9, 2017*

**Maths**

Cynthia’s afternoon train normally arrives at her station at 5:30 pm each day, where she is picked up by Alan and driven home. One day she was on an earlier train which arrived at 5 pm, and she decided to walk in the direction Alan was coming from home. Alan had left in ...

*March 9, 2017*

**english **

Which of the sentences below is an excerpt taken from "In Another Country" by Ernest Hemingway is an example of irony? A. My knee did not bend and the leg dropped straight from the knee to the ankle without a calf, and the machine was to bend the knee and make it ...

*February 21, 2017*

**Maths**

If The Roots Of The Equation X^2- bx+c are square root of alpha and square root of beta .show that alpa + beta = b^2- 2c and (alpha)^2 + (beta)^2 = (b^2 -2c - sqrt of 2c)(b^2 - 2c + sqrt of 2c)

*February 8, 2017*

**Social Studies**

in 3-5 sentences describe the apportionment system for state legislative districts I cant seem to think of any please help

*February 3, 2017*

**math**

use the method of substitution to solve the following pairs of simultaneous equation. 2m+n=0,m+2n=3

*January 29, 2017*

**Social Studies**

1. What was the landscape of the country prior to Imperialism? 2. What kind of resources made the country a commodity to the colonizers? 2. Who lived there? What was their daily life like? 4. What kind of leadership and hierarchy did the civilization follow? 3. When did ...

*December 15, 2016*

**math**

c. What do the slope and y-intercept mean in the context of this problem? Hint: What do you pay when you step into the cab?

*December 6, 2016*

**Math**

Let y=e^(cos^-1x) for modx<1. Show that (1-x^2)(d2y/dx2)=x(dy/dx) + y. By further differentiation, show that e(cos^-1x) ? e^a(1 - x + 0.5x^2 - bx^3) where a and b are real constants to be determined. I managed to show the first part but I don't get how to do the second ...

*November 30, 2016*

**Social studies**

why does the cartoon from the bank war 1832 portrat president jackson as a king

*November 22, 2016*

**Maths**

If X,y,a and b are real numbers and if x+yi = a/b+cosp+isinp , show that (b^2-1)(x^2+y^2)+a^2 =2abx

*October 17, 2016*

**Math**

Parmjit has 8 base ten blocks. She has at least one of each type of block. The value of her blocks is between 400 and 600. What blocks could she have? Find the possible answers using an organized list.

*October 13, 2016*

**Math**

Parmjit has 8 base ten blocks. She has at least one of each type of block. The value of her blocks is between 400 and 600. What blocks could she have? Find the possible answers using an organized list.

*October 13, 2016*

**History**

which represents an aztec adaptation to their environment A. A surplus of farmed crops B.an accurate 365 day calendar C.a system of causeways D.farming in terraces

*September 27, 2016*

**Maths**

Thnx Reiny & Steve 4 d help rendered in per the past questions. Plse help in this, If the line through the point y=2x+c touches the hyperbola 4(x)^2-6(y)^2=24. Show that c=+-2sqrt5.

*September 25, 2016*

**maths**

Prove that in any triangle ABC Sin2A+Sin2B+Sin2C/SinA+SinB+SinC=8Sin(A/2)Sin(B/2)Sin(C/2)

*September 24, 2016*

**maths**

A variable tangent to the ellipse (x/a)^2 +(y/b)^2 meets the parabola y^2=4ax at L and M. Find the locus of the midpoint of LM.

*September 24, 2016*

**maths**

A Variable Tangent To The Ellipse (x/a)^2 + (y/b)^2 =1 meets the parabola y^2=4ax at L and M. Find the locus of the midpoint of L M

*September 23, 2016*

**History**

what statement best describes the government relationship with England that was in the middle colonies A. Middle colonies were all established as royal colony B.each have a different system based on the charter agreed upon with the king of England C.The king of England only ...

*September 12, 2016*

**Physics**

Given Two parallel plate capacitors with a seperation d(metres) in free space connected to a dc supply of volts,v. A dielectric material of thickness b(metres) is inserted between the plates so that a distance (d-b)m remains without dielectric. Show that the the pd per unit ...

*September 7, 2016*

**Maths**

Prove By induction that sinx + sin3x + sin5x +.... Sin(2n-1) =sin^2(nx)/sin3x

*September 7, 2016*

**Maths**

Plse Help how do you obtain the maximum value and minimum value of a quadratic equation like for , 1/11+8x-2x^2

*August 12, 2016*

**Maths**

Prove that 1+cosx+sinx/1-cosx+sinx=cotx

*August 12, 2016*

**Physics**

Explain Why the pressure of a gas in a nitrogen container falls continuously when the gas is continuously taken away while the pressure of a gas in a chlorine container remains constant until nearly all the gas is withdrawn

*August 11, 2016*

**Maths**

A right circular cone is circumscribed about a sphere of radius a .If h is the distance from the centre of the sphere to the vertex of the cone. Show that the volume of the cone is 1/3pi a^2(a+h)^2/(h-a). Find the angle of a cone when the volume is minimum

*August 9, 2016*

**Maths**

Show that the maximum volume of a cylinder of radius r which can be cut centrally from a right solid cone of height h and semi-vertical angle alpha is givenby (4pi/27)h^3tan^2alpha

*August 9, 2016*

**Maths**

Prove That Sin2A+SIN2B+SIN2C/SINA+SINB+SINC=8SinA/2SINB/2SINC/2

*July 28, 2016*

**Maths**

Prove That Sin2A+ Sin2B +SIN2C/sinA+SINB+SINC=8sinA/sinB/2COSC/2

*July 28, 2016*

**Maths**

Prove that cos3x/cosx-cos6x/cos2x=2(cos2x-cos4x)

*July 28, 2016*

**Maths**

Prove that (1+sinx-cosx/1+sinx+cosx)^2= 1-cosx/1+cosx

*July 27, 2016*

**Maths**

Solve For X if archtan(x)+archsin(x)=3/4pi

*July 27, 2016*

**Math**

k375 and k425

*July 27, 2016*

**Maths**

Please Help Differentiate Sin sqrt x from first principles

*July 24, 2016*

**Maths**

If X=loga(n), y=logc(n) where nis not equal to one . Prove that x-y/x+y=logb(c)-logb(a)/logb(c)+logb(a)

*July 23, 2016*

**Finance**

What is the monthly payment on $8,400 loan at 16.7% APR

*April 8, 2016*

**COMPUTER**

WHAT IS THE PROGRAMME IN QBASIC THAT ALLOW THE USER TOENTER HIS/HER NAME AND THEN DISPLAY A WELCOME NOTE TO THE NAME.

*February 14, 2016*

**Math**

Thanks Scott!

*January 28, 2016*

**Math**

The Distributive Property: Find the product mentally. Show the steps you used. 8*34 I know that 8*34=272 but how you do it with Distributive Property? Thanks!

*January 28, 2016*

**One SS Question!**

What was one event that helped make the US a world power? a. The country experienced the Great Depression. b. The country fought in World War I *** c. The country the Peace of Paris. d. The country fought in the French and Indian War.

*January 26, 2016*

**english p3**

mind map the Topic :a great surprise

*January 24, 2016*

**Science**

If you burn 16.5 ml of ethyl alcohol, C8 H18, that has a density of 0.789g/ml what mass of co2 is produced? I have no idea where to start.

*January 10, 2016*

**Science**

Thank you Ms. Sue!

*January 6, 2016*

**Science**

Imagine that the label on a sunscreen product reads, “Recommended by nine out of ten doctors.” No other information regarding this claim is provided. Why would a scientist tell a consumer to be wary of this statistical claim? A. Sunscreen products are ineffective. B...

*January 6, 2016*

**math**

if a 3 gram French fry accelerating at 5 meter's per second. what is he fries force?

*October 11, 2015*

**physics help**

The volume of gas îs 76cm at 27c and 800mm mercury pressure.what is the volume at s.t.p.?

*October 11, 2015*

**science**

light that has a frequency of 1.5 x 1015 Hz.

*October 9, 2015*

**Math**

Thanks Ms. Sue!

*September 10, 2015*

**Math**

A bus makes 28 stops every 2 hours. How many stops does it make in 3 hours? in 4 hours? How do you get 42 stops; 56 stops? Thanks!

*September 10, 2015*

**Math**

JOekkdjdkkdkd

*April 20, 2015*

**alegebra**

A sequence has the following pattern 3/2,4,15/2,12,35/2,24.Starting n=1 find the general term for the sequence?

*April 11, 2015*

**chem**

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 3.10 of sodium carbonate is mixed with one containing 4.43 of silver nitrate. How many grams of silver nitrate are present after the ...

*February 23, 2015*

**math**

If Matt filled a 2 1/5 cup container, how many 1/5 cups would he need to use??

*February 12, 2015*

**Program Designs**

The Daily Gazette accepts classified ads in several categories. For most ads, the newspaper charges 10 cents per word for the first 50 words, and 8 cents per word for every word after that. Design Visual Logic Flowchart for a program that accepts data about an ad: customer ...

*January 31, 2015*

**polynomial**

x= -2 , x= -1, x= 3 = (x 2)(x 1)(x-3) then you factorise (x0…5 3x 2)(x-3) x(x0…5 3x 2) - 3(x0…5 3x 2). Hope you can go on from here.

*January 19, 2015*

**maths**

4m = 400cm Where 1 tiles = 20cm x tiles = 400cm Now you cross multiply X x 20 = 1 x 400 20x/20 = 400/20 X = 20 tiles

*January 14, 2015*

**algebra**

2x - 3(x 4) = -5 2x - 3x - 12 = -5 -X = -5 12 -X/-1 = 7/-1 X = -7

*January 14, 2015*

**Mathematics**

Nth = a (n -1)d ¡à 9th = a (9 - 1)d 9th = a 8d 5th = a (5 -1)d 5th = a 4d 9th term of an A.P is five times the 5th term ¡à 9th = a 8d = 5(a 4d) a 8d = 5a 20d a - 5a = 20d - 8d -4a/-4 = 12d/-4 a = -3d = Relationship.

*January 14, 2015*

**physics**

Wow..thats correct Devron, i dint see that from that angle. Well that's why u're there.

*January 14, 2015*

**physics**

A) How long, i suppose that's the time Time, T = 2uSin420†2/g T = 2 x 23 x 0.6691/10 T = 31.37/10 T = 3secs. B) I suppose that's the height too. Maximum height, H = u0…5Sin0…5420†2/2g H = 230…5 x (0.6691)0&#...

*January 14, 2015*

**algebra**

Let Type A = x Let Type B = (60 - x) Therefore Type A Type B = Totals $38.85x $30.49(60 - x) = 2004.96 $38.85x $1829.4 - $30.49x = 2004.96 $38.85x - $30.49x =$ 2004.96 - $1829.4 $8.36x/8.36 = $175.56/8.36 X = 21 Type A = 21 Type B = (60 - x) = 60 - 21 = 39

*January 13, 2015*

**algebra**

Check your next post i provided a solution, you can use the same parttern in solving this. Hope its helpful

*January 13, 2015*

**algebra**

number of pavilions seats(x) = x number of lawn seats(y) =( 1500 - x) number of pavilions seats (x) number of lawn seats (y) = $35,000 $25x $20(1500 - x) = $35,000 Hope you can go on from here.

*January 13, 2015*

**physics**

Heat gain = Heat loss (where 0.233) is the specific heat capacity of silver) Heat gain = mc(T2 - T1) = 5 x 0.233(96 - 20) = 5 x 0.233 x 76 = 88.54j

*January 12, 2015*

**math**

S.I = PRT/100 (Where P = principal, R = rate, T = time) S.I = 28 x 1 x 25 S.I = 700

*January 12, 2015*

**Math**

(x0…5-2x)/(x 1)x (x0…5-1)/(x0…5 x-6) = x(x-2)/x 1 x (x 1)(x-1)/(x 3)(x-2) =X/1 x (x-1)/(x 3) =x(x-1)/(x 3) Well hope its helpful.

*January 10, 2015*

**Integrals**

Find the Integral values of X and Y satisfying the inequality 3x + 5x ¡Ü 15, given that Y >0, Y < 3 and X > 0

*January 10, 2015*

**math**

Let Tom's pencil = x Greg's = 3/5(x) Totals = 3/5(x) x = 56 = 3x/5 x = 56 = 3x 5x = 280 = 8x/8 = 280/8 = X = 35 Therefore. Tom's pencil = 35 Greg's = 3/5(35) = 21 Tom has (35 - 21) = 14 pencils more than greg.

*January 10, 2015*

**ratio**

Ratio = 5:12

*January 10, 2015*

**science**

Heat gain = Heat loss 0.38kj = mc(T2 - T1) 0.38kj = 19.6g x 2108(T2 - (-12)) (where 2108 is the specific heat capacity of ice.) 0.38 x 1000 = 19.6/1000 x 2108(T2 12) 380 = 0.0196 x 2108(T2 12) 380 = 41.32(T2 12) 380 = 41.32T2 495 380 - 495 = 41.32T2 -116/41.32 = 41.32T2/41.32...

*January 10, 2015*

**calculus**

Yeah.. Thanks Damon! I now have an idea of how to go about that. But if you don't mind..can you give me an idea on how to go about this problem also? Solve ¡Ò 2(2x -3)0…5/0…6

*January 10, 2015*

**calculus**

Please how do i integrate this = ¡Ò (5 x⁶ + 2/x³ ) ? Thanks

*January 10, 2015*

**physics**

A locomotive is running at a constant speed of 100 km/ h. The diameter of driving wheels is 1.8 m. The stroke of the piston of the steam engine cylinder of the locomotive is 600 mm. Find the centripetal acceleration of the crank pin relative to the engine frame.

*December 31, 2014*

**physics**

A flywheel is making 180 r.p.m. and after 20 seconds it is running at 140 r.p.m. How many revolutions will it make, and what time will elapse before it stops, if the retardation is uniform ?

*December 31, 2014*

**physics**

A cage descends a mine shaft with an acceleration of 0.5 m/s2. After the cage has travelled 25 metres, a stone is dropped from the top of the shaft. Determine : 1. the time taken by the stone to hit the cage, and 2. distance travelled by the cage before impact.

*December 31, 2014*

**statistics**

find the area under the curve y=3log1.2x between x = 1.2 and x = 3

*December 18, 2014*

**Physics**

1 Angstrom = how many Coulombs?

*August 29, 2014*

**English**

Yes u can't tell a man what to do

*June 22, 2014*

**Physics**

I don't understand.

*April 4, 2014*

**Physics**

An infinitely long thin metal strip of width w=12cm carries a current of I=10A that is uniformly distributed across its cross section. What is the magnetic field at point P a distance a=3cm above the center of the strip? I have tried using the integration method but cannot get...

*April 4, 2014*

**CHEMISTRY URGENT!!!!**

An electron transition in a single H-atom from n=3 to n=2 results in the release of a single photon. What is the wavelength of this photon in nanometers? NEED ANSWER CUZ MINE ISNT WORKING

*January 27, 2014*

**Chemistry, due soon please help**

calculate the mass of 100 ppm of CO2 int the atmosphere if the atmospheres mass is 5.3x10^18 kg

*December 16, 2013*

**key boarding and word processing**

You want to include a title page for a report you're sending out. How should you format the title on this page?

*December 9, 2013*

**Algebra 1**

Tell whether each number in the list is a real number, a rational number, an irrational number, an integer, or a whole number. Then order the numbers from least to greatest. Square root of 64, -5, square root of 9, and 2

*September 26, 2013*

**math**

D is 30 feet above the ground.

*September 24, 2013*

**math**

A stunt motorcyclist makes a jump from one ramp 20 feet off the ground. The jump between ramps can be modeled by y= -1/640x^2 + 1/4x +20 where x is the horizontal distance (in feet) and y is the height above ground (in feet). I think a is 20 feet, but I don't know how to ...

*September 24, 2013*

**math**

The sum of two decimal numbers is 3.9 Their difference is 0.9,and their product is 3.6 What are the two numbers?

*September 24, 2013*

**MATH**

Give the number whose hundreds place is one-third of the greatest one-digit number, the tens place is twice the hundreds place divided by 2, and the three digits in the thousands period is the product of the digits in the units period.

*June 23, 2013*

**PreCalc**

sorry that should be theta-omega not omega-theta

*May 8, 2013*

**PreCalc**

If tan theta = 9/5 and cot omega = 9/5 Find the exact value of sin (omega-theta)

*May 8, 2013*

**Math**

The answer is integer

*April 30, 2013*

**Principles of Management**

Question 1 of 20 5.0 Points Which of the following is NOT a benefit of planning? A. Helps you check on your progress B. Helps you think ahead C. Helps you cope with uncertainty D. Helps you compare your results to a standard Reset Selection Question 2 of 20 5.0 Points XYZ ...

*April 22, 2013*

**Chemistry**

2. In a calorimeter, 40.0g water at room temperature (20.4 C) was mixed with 60.0 g of water that was initially 48.9 C. The resulting mixture reached a maximum temperature of 37.3 C. Calculate each of the following. a) The heat released by the hot water. b) The heat absorbed ...

*April 16, 2013*

**Science(Chemistry)**

spirit

*April 16, 2013*

**Chemistry**

In units of joules. And in units of calories?

*April 9, 2013*

**Chemistry**

If the temperature of 150.0g of water increased from 23.3C to 44.8C, how much heat was absorbed

*April 9, 2013*

**Chem**

The specific heat of zinc is 0.096 cal/(g °C). Determine the energy required to raise the temperature of 26.1 g of zinc from room temperature (20.0 °C) to 150 °C.

*April 4, 2013*

**math (Algebra)**

(c+x)squared ----------------- 2y c= -8 x= 10 y= 6

*April 3, 2013*

**math problem**

The diameter of a circle is increased by enough to increase the circumference by 20%. By what % is the area of the circle increased ? ( Hint: Try a number like t=5.)

*February 17, 2013*

**ENG1511**

He thought he could pay his school fees

*February 15, 2013*

**math**

if i have abook of 30 pages and i number each pages, how can i figure the digit number

*February 12, 2013*