Thursday

August 27, 2015
Total # Posts: 83,571

**URGENT CHEMISTRY**

Im not asking to do all my hw I just want to know what do How do you multiple O2 to ^2 Is it with the mass or ?
*August 4, 2015*

**Urgent math**

It's supposed to say 2.5x + 2.8(480-x) = 2.68(480
*August 4, 2015*

**Urgent math**

5x + 2.8(480-x) = 2.68(480
*August 4, 2015*

**Math**

A grocer wishes to blend two different coffee brands because he wants to make a blend of 480 pounds to sell at $2.68 a pound. If he uses a brand of coffee worth $2.50 a pound with another brand worth $2.80 a pound, how many pounds of each does he use? Please tell me the steps ...
*August 4, 2015*

**math**

The wouldn't it be 1.5x+1344=1286.5
*August 3, 2015*

**math**

A grocer wishes to blend two different coffee brands because he wants to make a blend of 480 pounds to sell at $2.68 a pound. If he uses a brand of coffee worth $2.50 a pound with another brand worth $2.80 a pound, how many pounds of each does he use?
*August 3, 2015*

**math**

3^200/3^50 a. 4 b. 150 c. 3^4 d. 3^150
*August 3, 2015*

**Life orientation**

Campaing with responsibility
*August 3, 2015*

**Life orientation **

What is the following statement mean? In terms of media. "media do not tell us what to think but they tell us what to think about"
*August 3, 2015*

**Administrative Office Procedures**

Thanks Ms. Sue.
*August 3, 2015*

**Administrative Office Procedures**

If you have several calls coming in at one time, you should: A. ask someone else to help you. B. answer each call as soon as possible, saying, "Good Morning, Mr. Smith's office, will you hold, please?" C. handle one call at a time. D. answer each call by placing...
*August 3, 2015*

**calc**

Use the graph of f(t) = 2t + 4 on the interval [−4, 6] to write the function F(x), where f of x equals the integral from 2 to x of f of t dt.
*August 3, 2015*

**Chemistry**

1)During an endothermic reaction, total energy A. decreases. B. increases. C. stays the same. D. cannot be determined. 2)The enthalpy of formation of an element is A. negative. B. positive. C. zero. D. negative or positive, depending on which element. i think number 1 is A for...
*August 3, 2015*

**life science**

I doooont kknow
*August 3, 2015*

**calc**

Use the graph of f(t) = 2t + 4 on the interval [−4, 6] to write the function F(x), where f of x equals the integral from 2 to x of f of t dt.
*August 3, 2015*

**Algebra**

Oh! and 5/4 equals 1 and 1/4.
*August 2, 2015*

**Algebra**

6 and 3/4 + x = 8 Step 1: Turn 6 and 3/4 into an improper fraction. 6*4 = 24 which added by 3 = 27, so the improper fraction would be 27/4 . If you'd like you can change it to 6.75 if you're more comfortable with decimals. Step 2: You need to do 8 - 27/4 in order to ...
*August 2, 2015*

**stats**

A survey of 38 people was conducted to compare their self-reported height to their actual height. The difference between reported height and actual height was calculated. You're testing the claim that the mean difference is greater than 0.8. From the sample, the mean ...
*August 2, 2015*

**math**

given that the funcfion f(x)= X+p/X-3. find f(x)
*August 2, 2015*

**Physics kinematics**

a = (60-40)/2 = 20mi/hr-s So, to decelerate from 25 mi/hr to zero, it will take (25mi/hr)/(20mi/hr-s) = 1.25s
*August 2, 2015*

**physics**

Find the partial pressure of nitrogen gas in the equatjon at one atmosphere atm Nitrogen+Oxygen gives Niticoxide
*August 2, 2015*

**physics**

Find the partial pressure of nitrogen gas in the equatjon Nitrogen+Oxygen gives Niticoxide
*August 2, 2015*

**Math ho.**

Nope. If there are n pieces(n an integer), then each piece is 25/n meters long. Since n is an integer, 25/n is a rational number.
*August 2, 2015*

**science**

what is the farenheit celsius kelvin of 300 ml of coffee . ?
*August 1, 2015*

**Algebra**

how do you solve this, its about rational expressions ?? 4 2 -------- + -------- X^2–4x+1 x^2-1
*August 1, 2015*

**trigonometry**

If you mean 1/sin2x + cos4x/sin4x then that is 1/sin2x + (2cos^2 2x - 1)/(2sin2x cos2x) = (2cos2x + 2cos^2 2x - 1)/(2sin2x cos 2x) Not sure just what you are after
*August 1, 2015*

**Physics**

Consider the figure above, where a rigid beam of negligible mass and 10 m long is supported by a cable attached to a spring. When NO block is hung from the beam, the length L (cable-spring) is equal to 5 m. Assume that immediately after block (weight of 280 N) is hung at the ...
*August 1, 2015*

**Chemistry**

6molAgNO3*molAg2CrO4/molAgNO3=molAg2CrO4 You need to use coefficients from chemical equation, you didn't give one, and plug coefficients into mol ration : mol/mol
*August 1, 2015*

**Probability/Statistics**

a. There are 100! final exams possible, by permuting all 100 questions. b. see part a. c. The experiment is not clearly defined, so neither is the number of outcomes. If the experiment is to determine the number of exams possible, the number of outcomes does not depend on the ...
*August 1, 2015*

**Managerial Accounting**

Inmelt Corp charges price of $6.50. Total Fixed Cost is 314,400. per year, break-even point is 131,000 units. What is the variable cost per unit.
*August 1, 2015*

**Chemistry**

A catalyst lowers the activation energy of a reaction to speed it up
*August 1, 2015*

**Physics**

Consider the figure above consisting of three particles of mass m attached to a massless rod. Given an axis of rotation through point P, the rod rotates as shown in the figure. If the rod is released from rest in the horizontal position at t = 0. What is the angular ...
*August 1, 2015*

**math**

if y=y(x) is a solution of y' = y/x + x/y and y(1)=2 then y(e) is ? so I used the homogeneous equation method and subbed v=y/x then found y' = xv' +v and subbed those into the original equation to get xv' + v = v +1/v what do i do from here?
*August 1, 2015*

**math**

Separate the variables and you have (y-1)/y dy = -(x^2-x+1)/x dx (1 - 1/y) dy = (1-x + 1/x) dx y - lny = x - x^2/2 + lnx + c Unfortunately, this has no explicit formula for y, using only elementary functions.
*August 1, 2015*

**math**

the general solution of the diff. eq. is y' = (1/x)(y/(1-y)) - (1-x)(y/(1-y)) what is the implicit form? what method would I use for this?
*August 1, 2015*

**Physcis**

A uniform meter sick of mass 200 g is held horizontally by two vertical strings, one at the zero cm mark and the other at the 89 cm mark. Find the tension in the string at the 89 cm mark.
*August 1, 2015*

**math**

Jason invested $13700 for 2 years and received $1096.00 in interest. At what rate did he invest if the interest was calculated using the simple interest formula? Use the formula
*August 1, 2015*

**Physics**

A small 700 g ball on the end of a thin, light rod is rotated in a horizontal circle of radius 1.5 m. Calculate the torque needed to keep the ball rotating at a constant angular speed if the air resistance experienced by the ball is 0.1200 N. Ignore the rods moment of inertia ...
*August 1, 2015*

**Physics**

Support 2 is at the other end and the gymnast is supposed to be over support 2
*August 1, 2015*

**Physics**

A gymnast with a mass of 54 kg stands on the end of a uniform balance beam as shown in the figure. The beam is 5.00 m long and has a mass of 250 kg. Each support is 0.54m from the end of the beam. What is the force on the beam due to support 2? 0 ---------------------- I1 I2 0...
*August 1, 2015*

**Physics**

A softball player swings a bat, accelerating it from rest to 8 rev/s in a time of 0.3 s. Find the torque the player applies to one end of the bat. Approximate the bat as a 2.2 kg uniform rod of length 0.95 m.
*August 1, 2015*

**Algebra problem**

Distance = velocity multiply by time S = vt
*August 1, 2015*

**High school Algebra**

looks like substitution to me. To send a reply, just submit a new "answer"
*August 1, 2015*

**physics**

Man, those are some giant steps! I assume you want the ball to hit the bottom just pas the lowest step. the ball has to drop 5*1.45 = 7.25 m while it travels horizontally 5*1.5 = 7.5 m. So, how long does it take to fall 7.25m? 4.9t^2 = 7.25 Use that time to find the horizontal...
*August 1, 2015*

**Engineering**

Same base so, log (x/y) = 2 10 raise to log (x/y) = 10 raise to 2 So, x/y = 10^2 x = 100y
*August 1, 2015*

**maths**

not sure what the "k" is, but assuming it's a currency symbol, we have, letting the price be p per orange, 2.40/(p + 1/2) < 16 2.40 < 16p + 8 -5.60 < p That indicates that p can be any positive value. Better explain just what you want to know.
*August 1, 2015*

**philosophy 208**

According to the video “Religion, War, and Violence,” Just War Theory asserts that military intervention (Points : 1) can be seen as an act of altruism must always have an altruistic component must be primarily an act of altruism must never have an altruistic component
*August 1, 2015*

**Chemistry**

What is the correct order of increasing acidity of the following acids;HF,HI,HCl,HClO4 and HBr.
*August 1, 2015*

**alpha**

1/cosø + sinø/cosø = x (1+sinø)/cosø = x (1+sinø)^2/(1-sin^2ø) = x^2 1+2sinø+sin^2ø = x^2 - x^2sin^2ø (1+x^2)sin^2ø + 2sinø +(1-x^2) = 0 Now you can use the quadratic formula to express sin&...
*August 1, 2015*

**Math**

Imagine an industry with 100 employees. 35 of them are female. 18 of them work full time. So the rest works part time. 35 - 18 = 17 17/100 = 0.17 So, 0.17
*July 31, 2015*

**math**

36.12 deg
*July 31, 2015*

**problem solving**

The specific heat of carbon (graphite) is 0.71 J/(g·°C). How much energy is given off as a 2 gram piece of graphite cools from 120°C to 20°C?
*July 31, 2015*

**5th grade math**

so is that the answer
*July 31, 2015*

**5th grade math**

is the first one 1 whole??
*July 31, 2015*

**5th grade math **

what can be a word problem that can be represented by the equation 1) 1/4 + 3/4=? 2- 7/8=?
*July 31, 2015*

**maths literacy,life science,agriculture,history**

hi guys i would like you to help with this quation, I am doing grade11 and doing the above subjects .I am wodering what should i major in at varsity something intresting.
*July 31, 2015*

**Life orientation**

Five interview question you will use to evaluate the understanding of service delivery protest by the learners in your school
*July 31, 2015*

**math**

-15+7
*July 30, 2015*

**math**

How many ounces of an alloy containing 30% gold on the world market must be added to 10 ounces of an alloy containing 5% to produce an alloy containing 20% gold?
*July 30, 2015*

**math**

there are 10 white socks and 6 black socks in a drawer. vic reaches into the drawer without looking and picks a white sock. he keeps the first sock out and reaches into the drawer again. to pick a second sock. what is the probability that the second sock vic selects will also ...
*July 30, 2015*

**Math**

You have to draw the figure to fully understand the problem. Since CE > CD, Pt E should be near pt B. Using sine law and cos law. You can get BE = 5.48
*July 30, 2015*

**math**

Henry are you saying it is wrong answer?
*July 30, 2015*

**physics**

A stone thrown vertically upwards from the top of a building takes 3s to reach its maximum height . Find 1. The velocity with which it is thrown 2.the maximum height it reaches above the builibg
*July 30, 2015*

**spanish**

Teresa ___ dio una camara a mi.
*July 30, 2015*

**Mahlogonolo**

Mathematics on a cubic function what do the zeros on the graph mean
*July 30, 2015*

**Math Important!**

So it's: b=2a a=g-2 a=gw+2 There are 2 gw cards, so there must be 4 a cards. If there are 4 a cards, there must be 8b cards and 2 g cards. 8+4+2+2=16 So 16 is the answer.
*July 30, 2015*

**science**

That's would not work! any more difference?
*July 29, 2015*

**calc**

Let F of x equals the integral from 1 to 3 times x of the natural logarithm of t squared. Use your calculator to find F″(1).
*July 29, 2015*

**computer**

for an integer matrix, int trace(int *a,int n) { int t=0,i; for (i=0;i<n;i++) {t += *(a[i*n+i])} return t; }
*July 29, 2015*

**Physics**

A child pushes tangentially on a small hand driven merry- go- round. She is able to accelerate it from rest to 18 rpm in 10 s. Modeling the merry go round as a uniform disk of radius 2.5 m and mass 780 kg, find the torque required to produce that acceleration. Neglect the ...
*July 28, 2015*

**Physics**

A potter is shaping a bowl on a a potter’s wheel. The wheel rotaes at a constant angular speed. The frictional force between her hands and the clay is 1.25 N. How large is the torque she produces on the wheel if the diameter of the bowl is 13 cm.
*July 28, 2015*

**Physics**

Fred Flintstone’s club–ax is made up of two parts: an uniform 3.0 kg stick and a symmetrical 10 kg stone attached to the end of the stick. The dimensions of the club-ax are shown in the figure. How far is the center of mass from the handle end of the club-ax? Express...
*July 28, 2015*

**Physics**

A system consists of the following masses loacted in the xy- plane: 5.0 kg at the point (0,5), 7.5 kg at the point (3,8) and 6.5 at the point (-3, -6). Find the distance from the origin to the center of mass.
*July 28, 2015*

**Algebra**

The sum of the coefficients of any polynomial $f(x)$ equals $f(1)$, since letting $x = 1$ in any term $cx^n$ gives us the coefficient $c$. That is, if \[f(x) = a_nx^n + a_{n-1}x^{n-1} + \cdots + a_1x + a_0,\] then \begin{align*} f(1) &= a_n\cdot 1^n + a_{n-1}\cdot1^{n-1} + \...
*July 28, 2015*

**Physics**

A uniform solid sphere rolls along a horizontal frictionless surface at 35 m/s and makes a smooth transition onto a frictionless incline having an angle of 300. How far up the incline does the sphere roll when it comes to a momentary stop? Note for a sphere I= 2/5Mr2, where M ...
*July 28, 2015*

**Physics**

Three children are trying to balance on a seesaw. The seesaw is 3.9 m long and pivots about a rock at its center. Louie and Laura are already sitting on opposite ends. If Martha weighs 27 kg, where should she sit so as to balance the seesaw? 50kg kid--------------35kg kid...
*July 28, 2015*

**AP Chemistry**

24.6gFe2O3*molFe2O3/MolarmassFe2O3*2molFe/1molFe2O3= mol Fe
*July 28, 2015*

**Physics**

Its an angle of 30 not 300
*July 28, 2015*

**Physics**

A uniform solid sphere rolls along a horizontal frictionless surface at 35 m/s and makes a smooth transition onto a frictionless incline having an angle of 300. How far up the incline does the sphere roll when it comes to a momentary stop? Note for a sphere I= 2/5Mr2, where M ...
*July 28, 2015*

**Physics**

A bolt requires tightening to a torque of 98 N-m. If a wrench is 28 cm long, what perpendicular force should be applied at its end?
*July 28, 2015*

**maths**

Volume of tank V = 4πradius^3/3 where radius of tank=1.5 m Pipe radius, r = 0.3 m pipe length (per second)=0.2 m Volume per second, v= πr^2*L Time = V/v in seconds.
*July 28, 2015*

**math**

please solve x- 11/21= -10/21
*July 28, 2015*

**Physics**

A system consists of the following masses loacted in the xy- plane: 5.0 kg at the point (0,5), 7.5 kg at the point (3,8) and 6.5 at the point (-3, -6). Find the distance from the origin to the center of mass.
*July 28, 2015*

**Geometry**

The area of a right triangle is 36. What is the shortest possible length of its hypotenuse? A.6 B.root72 C.12 D.none of these
*July 28, 2015*

**Logic**

This is the information about students participating in a field trip: 36 were female students, 13 were male seniors, 41 were not drama majors, exactly half of the drama majors were male, a third of the female students were drama majors but not seniors, there were 15 senior ...
*July 28, 2015*

**Physics**

A child pushes tangentially on a small hand driven merry- go- round. She is able to accelerate it from rest to 18 rpm in 10 s. Modeling the merry go round as a uniform disk of radius 2.0 m and mass 800 kg, find the torque required to produce that acceleration. Neglect the ...
*July 28, 2015*

**Geometry**

Given a triangle with side lengths: root3, root3, 3, find the measure of its smallest angle.
*July 28, 2015*

**Physics**

The spin-drier of a washing machine slows down uniformly from 700 rpm (revolutions per minute) to 140 rpm while making 50 revolutions. Find the angular acceleration through these 50 revolutions. Express your answer in rad/s^2.
*July 28, 2015*

**Physics**

A belt passes over a wheel of radius 25 cm. If a point on the belt has a speed of 26 m/s. How fast is the wheel turning? Express your answer in rad/s.
*July 28, 2015*

**government secondary school**

maths:x^4+3x-2/(x^2+1)^3(x-4)=(Ax+B)/(x^2+1)+(Cx+D)/(x^2+1)^2+(Ex+F)/(x^2+1)^3+G/(x-4)+H/(x-4)^2.fine the value of ABCDEFGH,it a partial fraction o plz i need the solution urgently
*July 28, 2015*

**Physics**

physics
*July 28, 2015*

**Physics**

Romeo takes a uniform 11 m ladder and leans it against the smooth wall of the Capulet residence. The ladder's mass is 18.0 kg, and the bottom rests on the ground 2.8 m from the wall. When Romeo, whose mass is 79 kg, gets 90% of the way to the top, the ladder begins to slip...
*July 28, 2015*

**Physics**

A particle is projected from the surface of Earth with a speed equal to 2.4 times the escape speed. When it is very far from Earth, what is its speed? ?km/s
*July 27, 2015*

**math**

oh thanks the question had a mistake it was what you said reiny
*July 27, 2015*

**math**

The dimensions of a box are 9 by 16 by radical 25. Its volume is a. 60 b. 3600 c. √(50) d. √(60) please explain
*July 27, 2015*

**math**

A.16 B.25 C.36 D.100 These are the choices for the question
*July 27, 2015*

**math**

The square of a certain whole number N is N squared.If 60 is a factor of N squared ,its possible that xis not a factor of N squared.
*July 27, 2015*

**English 9 grammar**

1. Which of the following is grammatically correct? (mixed constructions) A) Even though the boy left early does not mean he was sick. >>B) Even though the boy left early, it does not mean he was sick. 2. Which of the following is grammatically correct? (parallelism) A) ...
*July 27, 2015*

**English Vocab 9**

is number 6 B?
*July 27, 2015*