I solved (2x8)/z=y, and got 2yz8=x as an answer, which my teacher said was wrong. What would the right answer be then? What did I do wrong? Thanks!
83,117 results
Math  AP Calculus
The rate at which water flows into a tank, in gallons per hour, is given by a differentiable, increasing function R of time t. The table below gives the rate as measured at various times in an 8hour time period. t (hours) 0 2 3 7 8 R(t) (gallons per hour)

Calculus
Find the rate of change of f(x,y,z) = xyz in the direction normal to the surface yx^2 + xy^2 + yz^2 = 75 at (1,5,3). I keep getting this wrong and I don't know what I did right. The answer's 147/sqrt(101) but I got 357/sqrt(1361). Is my method right? Or

Math  Ms. Sue
1) Which is M = 9pn solved for p? a. p = M/n b. p = M  9n c. p = 9n/M d. p = M/9n 2) Which is M = 300J/P solved for J? a. J = 300PM b. J = 300M/P c. J = 3OO/PM d. J = PM/300 I don't really understand this but my answer are 1. d 2. b

calckinematics
if a particle moves along a line so that at time t where t [0,pi] its position is given by s(t)=4costt^2/2+10 what is the velocity of the particle when its acceleration is zero? so i found v(t) = 4sintt a(t)=4cost1 = 0 solved for t plugged it into v(t)

Physics MCAT, Help please
A box of mass m = 6kg slides with speed v = 4 m/s across a frictionless floor. It suddenly explodes into two pieces. One piece, with mass m1 = 2kg moves in the same direction with speed v1 = 8m/s. Find the velocity of the second piece. Its answer is 2 m/s

calc 1
If h(x) = the square root of 4 + 3f(x) where f(2) = 4 and f '(2) = 2, find h'(2). i got the derivative as 1/2(4+3f(x))^1/2 then i solved for the inside which is (0+3(8)) then multiplied the the two eating and i got 3.... but answer is wrong =(

math
What two fractions, add up to 1/3? i know its a very very stupid question, but my teacher said adding 5/30 + 5/30 is wrong (Which i did), but maybe he read the question wrong. Answer, Maybe?

Health of young children
A teacher is in a prime position to observe children because A.the teacher sees children in relation to other children of the same age. B. the teacher sees each child for fewer hours than the parent and can, therefore be objective. C.he or she is often

Science/Math/HElP
Science A 25N object is 3 meters up. How much potential energy does it have? our teacher said that the formula for finding out potential energy is PE = Mass * Gravity * Height. The gravity on Earth is always 9.8, but my problem is that instead of mass the

Math
Evaluate the following definite Integral ∫x * ln(x) dx from 1 to e^(2) I used the DI method which gave me D I + ln(x) x  1/x (x^2)/2 = (ln(x)*x^(2))/2  ∫ 1/x * x^(2)/2 = (ln(x)*x^(2))/2  ∫ x/2 = (ln(x)*x^(2))/2  x^(2)/4 + C (ln(x)*x^(2))/2 

Algebra
simplify (6x^2)^2(0.5x)^4 I think I know the answer is 2.25 but my work is wrong my teacher said and I need to get this right so plz any help is fine

Math
Evaluate the integral of (e^2x)*sin^3 x dx I let u = e^2x, du = (1/2)e^2x dx v= (1/3)cos^3 x , dv =sin^3 x dx When I used integration by parts and solved it all out I got: (37/36)intgral of (e^2x)*sin^3 x dx = (1/3)(e^2x)*cos^3 x + (1/18)(e^2x)*sin^3 x

math
Solve the quadratic equation by completing the square. Verify your answer graphically. (Enter your answers as a commaseparated list.) 16x2 − 24x − 23 = 0 my answer was: x =16(x−3/4)^2−32 but online website (where i do my assignments that is posted

calculus; implicit differentiation
Use implicit differentiation to find the slope of the tangent line to the curve at the point (4,1) 1x^2  4xy + 3y^3 = 29 I differentiated both sides and solved for dy/dx and got 2x4y/9y^24x. Then I plugged in X and Y and got 4/7 but when i enter my

math
I'm having a little trouble solving inverse variation. I have four problems  2 are solved using proportions, 2 are not  why can they not all be solved using proportions? 1. y varies inversely with x. If y = 40 when x = 16, find x when y = 5 If I use a

math
Reduce the fraction to lowest terms. Do not use spaces in answer. 38x^2yz^2 __________= 19xy^2z^3

chemistry
6.2(+_ 0.2)  4.1 (+_ 0.1 ) + ? [6.2( +_ 0.2)  4.1(+_ 0.1)] : 9.43(+_0.05) find absolut uncertainty and relative uncertainty. PLEASE HELP:I solved them and got the exact absolute uncertainty like the answer key, but I didn't get right answer of relative

algebra
Solve for s in this equation. Depreciation. D=Cs/n This is my answer DC=Cs/nc DC=s/n n(DC)=s/n*(n) nD+nC=s s=n(CD) Please chack to see if this is correct Looks fine to me. A slightly shorter (by 2 lines) rearragement is: D=Cs/n D+s/n=C s/n=CD

Supportive learning environment
It was the wrong question...Sorry Scott is just beginning to learn the names for the letters of the alphabet. Which of the following would be an example of the teacher scaffolding his learning? A. The teacher tells Scott, "You need to learn all your

math
For the pair of numbers (1/5),(1/2) My teacher wants us to find the quadratic equation with integral coefficients that has these numbers as solutions. I am not sure if I have the right equation for this. Could someone let me know if I am right or wrong

Math integrals
What is the area of the region bounded by y=x^2, the tangent to this parabola at (1, 1) and the xaxis? Since it says that the parabola passes through 1,1 can I assume that the line is y = x or is that completely wrong? Doing that I got ∫ x  x^2 dx

Physics
A capacitor is made from two 1.2 cm diameter coins separated by a 0.18 mm thick piece of paper (K = 3.7). A 6 V battery is connected to the capacitor. How much charge is on each coin? My solution: C= K * Permitivity * A/d = q/v I solved for q and got 1.2 X

math:solving for an exponent.
I can't get the right answer, where am I going wrong? 7.0x10^9= (6.7x10^9)(2.72^r*3) 1.04 = 2.72^r*3 When I solve for this, I get ln (1.40) = 0.03922 then 0.03922 / 3 = 0.0130 So my r equals 0.0130 BUT the teacher says the answer is 0.05 = r *3 0.02 = r

Math
lim as x approaches negative infinity (3x^5 + 6x +  3) / (8x^4 + 10) a. Does Not Exist b. 0 c. 3/8 d. 3/8 I solved this and got negative infinity as the answer, but none of the answers are listed above. I finally chose Choice C, but my teacher said the

chemistry/math
The density of air at ordinary atmospheric pressure and 25°C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 12.0 ft 12.5 ft 7.3 ft? i made ft^3 into Liters and got 8,346,211.799 then I made the grams into kilograms and set

Social Studies 7R (answer quick)
I got my Native Americans test back today during ss and I got a 77 (4 qs. wrong there was 10 mulitple and 13 reponse but my teacher think it will take for ever for us to do the test so we had to do all the multiple qs. and for the reponse qs. do 9 qs. and

math,help
on one of last week homeworks i got this one wrong can someone explain to me what is the correct format. The demand supply equations for a certain item are given by: D= 5p+40 S=p^2+30p8 The correct answer was: $1.43 how do you get to this answer because

math
Could someone please show me what I did worng in my math questions? any help will be greatly appreciated! I put my teachers response under the questions 4. Solve: 52x + 1  = 55 Divide both side by 5: 2x+1=11 2x+1=11 and 2x+1= 1 +1 +1 +1 +1 2x = 12 2x

math
The graph of the equation 8x–5y=14 passes through a point with an abscissa of 1.2. Find the ordinate of the point. I got .8 repeating but my teacher said that it was wrong. I then got 9.6 and it was also wrong. what am I doing wrong and can you put the

Chemistry
so i got a test and like usual my teacher didn't teach me half of the stuff that's going to be on it so he gave us a pretest of what is going to be on it and an answer key and i got several questions 13.) what is the pH of a formic acid if the

MATHStuck :(
I really need help factoring these special Trinomials. This question really puzzled me. I thought I had it correct, but when I checked the answer at the back of the book, I was wrong, and so I would like to know what was it that I had done wrong. This was

English
I wrote, "I like to swim in summer." My teacher marked it wrong and said it should read "I like to swim in THE summer." Can anyone offer an explanation, please, why my way is wrong? I don't know why it was marked wrong. Both with and without "the" are

Please Check My Math Work
Hi.  I solved this problem,but I am not sure if it is correct.If you can please tell me if it is right or if it is wrong what is wrong with it.: 6y^254= (3y6)(2y+9) *Many of you may be are wondering why my title is,"[C]razy Baby.  [Iloveyou]"it is

Chemistry
An aqueous solution of ammonium nitrite decomposes when heated to give off nitrogen gas and water. This reaction can be used to prepare pure nitrogen gas. How many grams of ammonium nitrite must have reacted if 3.75 liters of nitrogen gas was collected

English
1. He is a social science teacher. 2. He is teacher. 3. She is a home economics teacher. 4. She is a HE teacher. 5. She is a technical arts and homemaking teacher. 6. She is a TAH teacher. 7. She is a healthe education teacher. 8. She is a HE teacher. 9.

General Chemistry
So I've been working on this online homework problem and got it wrong 8 times. I need help. Here's the question: 1,2diaminoethane, H2NCH2CH2NH2, is used extensively in the synthesis of compounds containing transitionmetal complexes in water. If pK_b1

math
kelly solved the following problem on her recent math test 121/11+4*8=120 the answer was marked wrong by your teacher and kelly is asking you to explain why she missed the promblem.whicthsolutions would you tell her A.divide 121 by 11,multipy 4 by 8 then

Calculus
Which of the following is a point at which the tangent to y=(x2)^2(x+3) is horizontal? a) (2,16) b) (1, 18) c) (1,4) d) (2,0) I found the derivative of y=(x2)^2(x+3) which is 3x^22x8 if I solved for 0, it wouldn't give me the answer that are listed

Math
lim as x approaches negative infinity (3x^5 + 6x +  3) / (8x^4 + 10) a. Does Not Exist b. 0 c. 3/8 d. 3/8 I solved this and got negative infinity as the answer, but none of the answers are listed above. I finally chose Choice C, but my teacher said the

Introduction to Educational Theory
We have to analyze this situation: A teacher demeans her students. The teacher calls her students lazy and says they will end up in remedial classes. She states that anyone with less than a B "obviously doesn't care." The teacher sometimes refuses to

algebra
There was a question on my quiz asking 5/6x=25 what is x. I got the answer 30.12 but my teacher says it is wrong because the answer is 30. I don't understand how to get just 30

physics
A 0.40kg piece of putty is dropped from a height of 2.9m above a flat surface. When it hits the surface, the putty comes to rest in 0.32s . What is the magnitude of the average force exerted on the putty by the surface? I keep getting 9.4 as the answer,

physics
a 1500 kg car travelling at 16.7 m/s to the south collides with a 6300 kg truck that is initially at rest at a stop light. the car and the truck sticks togetherand moves together after the collision. what is the final velocity of the twovehicle mass?

math
Can someone help me answer this question? It's combining like terms, my teacher said that the first term is right but the rest is wrong. Question~~ 2x^2y–5xy–7xy–8x^2y+9xy^2 –xy^2 My answer ~~ 2x^2+8x^2 (28)x^2 6x^2 y+y+y+y (1+1+1+1)y 4y

Math
Hi, I am getting very frustrated. I am doing an online homework for chemistry and it's telling me to round to the nearest WHOLE number. So the answer I got was 1435.650.... And I typed in 1436. and said I was wrong and so I tried it again and typed 1.4 x

Algebra 1
Randy, Sam, Tim and Will counted the number of puzzles they had solved in two months. Sam has solved twelve more than Tim. Randy had solved seventeen less than Sam.Will had solved twice as many as Randy. They have solved a total of 267 problems. How many

Chemistry
IGNORE MY FIRST POST. I CORRECTED THIS ONE Write IUPAC name of the following alkanes: 1. (CH3)3 CCH2CH2CH3 all the numbers are subscripts. So there are 3 CH3's, C,CH2,CH2, and CH3 This is what my teacher has in my homework. The parenthesis really throw

Algebra
(−2x^2yz^2+3x^2y)·(−5y^2z^3−4z)·(xy^2+z)

Writing:Quotes, Journal
Please may you check my answers for a quote that says> Knowledge speaks, Wisdom listens. This quote indicates that people with knowledge will give aedvices to people, and people that listens to the individuals are wise to do so. For an example, let's

prealgebra
it says use equivalent ratio's to solve the proportion!!! ok is there a different way to do them kind of proportions because i did it like that yesterday and my teacher said they were all wrong Give an example of what you did and how you came up with your

Science math
Can no one help me? I posted a question earlier I don't need answer I need to understand what I did wrong my thinking is that if I have a 2:1 ratio And my total is 99 that if I divide by 3 then I can get the amounts 33x2 is 66, then 33x1 is 33 so it would

math
Could someone please check my math questions? any help will be greatly appreciated! 4. Solve: 52x + 1  = 55 Divide both side by 5: 2x+1=11 2x+1=11 and 2x+1= 1 +1 +1 +1 +1 2x = 12 2x = 10 X=5 x=6 What my teacher said was wrong~~ 2x+1=11 and 2x+1= 11

math
Can you tell me how you would answer this question? My teacher says that one answer is correct but I think that my answer is correct. I want a second opinion. A soccer coach purchases 12 uniforms for 17.50 each. He buys 6 soccer balls for 8.58. How much

Math
I Don't Know What Is This Subject Called In English But It's About Complex Numbers it says 25 = 16  9 i^2 = (4 ± 3i) But My Teacher Says 25 = 25  0 i^2 = (5 ± 0i) I Think My Teacher Is Wrong , The Result Is 25 But There Will Not Be Complex Number

Algebra
On my quiz for (3x+2)^2, I wrote the answer as 21x=4. My teacher gave me a minus one, which meant it was half wrong. What is wrong about my answer? Thanks

Physics
An 85kg person bounces on a bathroom scale having a force constant of 1.50*10^6 N/m. The amplitude of the bounce is 0.200 cm. What is the maximum energy stored in the spring? I use the formula mg = kx, solved for x, and got 5.55333 * 10^4. Then I added

Physics 11
The brakes on a car permit it to decelerate at the rate of 8.0m/s^2. How much distance is required to stop this car when it is travelling 60.0km/hr? The answer given is 173.6m I solved it this way 60km/h = 16.667m/s A=V/T 16.667m/s / .80m/s^2 = 20.834

MATHSTUCK :(
I really need help factoring these special Trinomials. This question really puzzled me. I thought I had it correct, but when I checked the answer at the back of the book, I was wrong, and so I would like to know what was it that I had done wrong. This was

Geometry
I need help solving for the height of a trapezoid and finding the correct final answer for a semi circle (a half circle).In area form Here's what I have so far: Trapezoid Formula: 1/2(b1+b2)h My Answer:1/2(5+15)=10 (My bases are 5 and 15) I need help

please help me with this problem
The problem is: (8.86 + 1.0 X 10^3) / 3.610 X 10^3 Well I got 2.73 X 10^3 as an answer, but I know for a fact that this is wrong because my teacher said it was. Your teacher is right. What do you get when you add 8.86 + 1.0 X 10^3 = 8.86 + .001 ? What

chemistry
SF4 > SF2 + F2 rate constant (k) = .011 l/molxS [SF4]2 How many minutes will it take for the concentration of SF4 to be reduced from 2.5 M to .25 M? I said this was a 2nd order reaction and used : (1/final)= kt + (1/initial) and solved for t. the answer

Physics HELP! QUICK!
A banked circular highway curve is designed for traffic moving at 55 km/h. The radius of the curve is 220 m. Traffic is moving along the highway at 38 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow

Geometery
A water storage tank is shaped like a circular cylinder with half of a sphere at each end. Find the volume of the tank if the cylindrical section is 100 cm long with a 40cm diameter. Use 3.14 for ~~ Be sure to round the final answer to two decimal places.

English
1. I stayed there for two weeks. 2. I stayed there two weeks. Are both grammatical?  3. This is the way how he solved the problem. 4. This is the way that he solved the problem. 5. This is the way he solved the problem. 6. This is

Calculus
Find the area under the curve of y=2x+6 from x=0 to x=3 using 3 strips of equal length using right endpoints. I tried this equation before and my answer was 9 but my teacher said it was wrong? and I also posted this before and Someone who helped me got

Chemistry
Can somebody explain how to do this? I am stuck. I've tried solving for H+ concentration. I got .00024M and subtracted it from [OH]. Then I solved for pOH and used that to get pH but still got the wrong answer. Somone plz explain this to me.

Physics!
Two identical isolated particles, each of mass 1.55 kg, are separated by a distance of 30.6 cm. What is the magnitude of the gravitational force exerted by one particle on the other?  I solved it as: Fg = G(m^2/r2) = G(m/r)2 = 6.673x10^−11

Due in an hour help please
Simplify: x^3+x^3 My answer was : 2x^6 is this incorrect because my test the teacher had marked it wrong as if he was saying that it. Was going to be. 2x^3 instead

plz help english
my question is: Complete the sentence below by interrupting it with two parallel if clauses: The problem of race relations, if………., and if………. must be solved. question is i wrote: the problem of race relation, if it goes on increasing, and if

Chemistry
@DrBob222 I got the last question that I posted wrong and I solved it the same way. Could you show me the answer and how you got it? My test is Friday and this is a practice problem. Suppose that 30 mL of 0.5 M CsOH and 55 mL of 0.1 M NaHS are mixed. What

Early Child Ed.
Would you mind please, checking these questions and my answers? 1. Which of the following is the best example of a teachable moment? A. A teacher telling a young child it is time to use the potty. B. A child struggling to put on his own shoes. C. A child

College Mathematics. 3
(3t+1)/5=(t+7)/10+(t5)/10 I solved this question through the linear equation simplification timing both sides by the least common denominator. 5 Once I did the the result was > 3t+1= 2t+14+2t10 T= 3 However the real answer is t=0 Where am I going wrong?

Algebra
Randy, Sam, Tim and Will counted the number of puzzles they had solved in two months. Sam has solved twelve more than Tim. Randy had solved seventeen less than Sam.Will had solved twice as many as Randy. They have solved a total of 267 problems. How many

math
I'm trying to multiply this and keep getting the wrong answer: (x  5)(0.025x + 220) I have used the FOIL method and I have multiplied (x  5) 0.025x and then multiplied (x  5) 220. Both methods I get the same answer. But... the answer book and the

Chemistry
What is the pH of the solution created by combining 2.40 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HC2H3O2(aq)? Can somebody explain how to do this? I am stuck. I've tried solving for H+ concentration. I got .00024M and subtracted it from [OH].

algebra integer problems
Hi! i have this problem, I'm stuck on. it says find 2 consecutive multiples of 9 whose sum is 153. I started of my saying the 1st number is 9x and the 2nd is 9x+9. I continued on to get, 9x+(9x+9)=153 and solved it. I got an irrelevant answer: 9. I was

Calculator Help
Is there a difference between TI89 Titanium calculator and TI83 calculator? Because I'm taking a final exam and my teacher will only allow us to use a TI83 calculator and I've never used it... like for putting in the parentheses with the log when

English Grammar
As many of you know, I'm an ESL Teacher in Taiwan. I came across a sentence that does not sound right, but I am wondering if it's grammatically correct. "I like to have cats." I've NEVER heard it said like that before, but I cannot think of any reason why

algebra hsa
5x3=2(x6) i got 3 when i solved it but when i check my work its not correct what am i doing wrong?

Calculus
sif xyz=0 (3x^2yz)^3 p=27x^7y^4z^6 then p=?

French
my teacher marked these phrases as wrong but i don't know what about them is wrong: 1. je revelerais sans prevenir 2. j'ai vendu mes robes plus jolies both of them need "un mot a ajouter"

Algebra
I solved (2x8)/z=y, and got 2yz8=x as an answer, which my teacher said was wrong. What would the right answer be then? What did I do wrong? Thanks!

tere
what did i do wrong? i need to find lowest vapor pressure. a 0.13 m FeCl3 b 0.50 m sucrose c 0.24 m NaNO3 d 0.15 m Na2PO4 so i solved. a 4 x 0.13 = 0.52 b 1 x 0.50 = 0.50 c 5 x 0.24 = 1.2 d 7 x 0.15 = 1.05 i chose C but the answer is A. did i do something

Math
Can you tell me how you would answer this question? My teacher says that one answer is correct but I think that my answer is correct. I want a second opinion. A soccer coach purchases 12 uniforms for 17.50 each. He buys 6 soccer balls for 8.58. How much

math
(4 − 2x)−2 x=2 y=4 z=3 how do you solve this? i have solved it and gotten 6 for my answer many times and it says it's wrong. other equations are (y − z)−3 and (x − 5y)0. i cant get them right

cacl
integral of x^3+65/X^+7x+12 dx when i solved i got x^2/27x+64ln(x+4)111ln(x+3)+c however this isn't the right answer....what have i done wrong??

Physics
A rectangular piece of gold is 3.1 cm long and 3 cm wide. Resistivity of gold is 2.4*10^8. How deep is the piece when it displays a resistance of R = 1.65 μω for a current that flows along the depthdirection? I used R=(p*l)/A and solved for l. I got

grammar
Ms Sue your a good pesron and a good teacher to admitt that you was wrong and I admire you for that. I am still confused. I don't know what is right or wrong on this and I am getting freaked out on this. So please send me some explanation on the answer

math
how can I solve: 6³ + 6 ÷ 2¹  4² I got the answer wrong on the test and the teacher told me the answer was 203 but I want to know how to do it. I was to embarrassed to ask because all the other students knew how to do it

Ap algebra
2+3X^2X^3=0 by use quadratic formula. The answer of textbook is 3.19 So I solved and came out a wrong answer What I did factor out (X+3)X^2+2=0 Then By quadratic formula, a=1,b=0,c=2. Thus I got sqrt(8)/2

Calculus
1.) Consider the graphs x+5y=17 and x+7=y^2 where a=7 b=2 c=57 f(x) = ? g(x) = ? I have solved for a,b, and c but I can't figure out f(x) and g(x) For f(x) I thought it was (17x)/5 but it's not the correct answer. For g(x) I thought it was the sqrt(x+7)

math
the tripled product of 6a and b^2. I got 216a^3b^6, but my teacher says that this is wrong. my equation is \(6ab^2)^3 is this wrong?

math
rounding to the nearest ten 2,123 my child put 2,120 and the teacher said it was wrong. what is the correct answer?

Algebra
I need to rewrite the following as an equivalent logarithmic yt = x I wrote logy=logt=logx. My teacher said that was wrong. Can someone guide me on the right answer?

Math
Solve the indefinite integral of 1/sqrt(x^2+2x+5). I solved it all out by completing the square and then trig sub and then drawing a triangle to go back to x variable and got: ln (sqrt(x^2+2x+5)/2 + (X+1)/2 )  but the book answer is: ln (sqrt(x^2+2x+5)

Math
Solve the indefinite integral of 1/sqrt(x^2+2x+5). I solved it all out by completing the square and then trig sub and then drawing a triangle to go back to x variable and got: ln (sqrt(x^2+2x+5)/2 + (X+1)/2 )  but the book answer is: ln (sqrt(x^2+2x+5)

Math
The problem is ; 10x+8y X= 2 Y=5 Every time I do it I get 23 but my teacher says I'm wrong . where am I wrong ? someone help me please .

Algebra
What is the best estimate for 3 + (14.9)(2.3)? a 36 b 31 c 48 d 33 I came up with 36 but my teacher counted it wrong. I reworked it but still come up with A36. What am I doing wrong?

Math
Find the point (x,y) on the unit cirlce that corresponds to the real number t. t= 11 pie / 6 My answer was (1/2 , sqrt3/2) but my teacher said it is wrong!

Algebra
Remove the parentheses from the following expression: (2y + x) ÷ z. A. 2yz + xz B. 2y/z + x/z C. Z/2y + x D. 2y + x + z