Is x^2 - 2x 1 to 1? I keep getting yes every way I try to work it. Book says no. In the end, I get (with x1=1 and x2=-1 <- I use these numbers because of the x^2) f(x1)

67,677 results

Calculus

Is x^2 - 2x 1 to 1? I keep getting yes every way I try to work it. Book says no. In the end, I get (with x1=1 and x2=-1 <- I use these numbers because of the x^2) f(x1) = -1 and f(x2)=3. I can't seem to find if x1 = x2 (btw, I know that by the graph it is not, but I am ...

8th Grade Math-exponents

Let me try writing it again... (X/2)^3*(X/2)^4 --------------------- (X/2^3)^2 I keep getting X/2^6, but the book says X/2^5. How do you get X/2^5????

Probability

Find the probablity of getting a sum of at least 8 by tossing a six-sided die twice. I keep getting 5/36 but my book says 5/12.

6th grade math

Find the value fir each expression. Show your work. (13.28 - 7.8) divided by 4. I have the answer in the back of my book and when I try to work the problem out I keep getting the wrong answer. The answer is supposed to be 1.345 I can get the 1.34 but I get a remainder if 2. ...

Math

I can't figure out 6 - 2/3r = 1 1/2 The way we're learning how to solve it, is by using the LCD. the LCD I use is 6 The book says the answer is 6 3/4 But I keep getting the wrong answer.

Math

5 = 1/2 (x-6) I keep getting 8 as my answer, but the book says it's 16?

algebra

f(x)= 1/x-2 Plug in 1 for x. I keep getting -1 but the book says the answer is 3. Please help. Thanks

physics

Suzanne bikes 3 km to school every day. It takes her 20 minutes because she always has to stop at a traffic light. What is her average speed? A. 0.15 km/s B. 3 m/s C. 6.7 km/minute D. 9 km/h i keep picking A and C and getting this wrong. i know this is the formula: s = d/t but...

help C program

I keep getting an error that says "no new endline at the end of file" but i pressed enter and it still won't work. i am compiling with gcc are there anything else i should look at? I'm also compiling with other files together. and All the files have a new line at the end so ...

8th grade math-exponents

I can't quite write the problem, so I'll try to explain it as best I can. In exponents and in fractions... (X/2) to the 3rd power times (X/2) to the 4th power...all over,or divided by, (X/2 to the 3rd power) to the 2nd power. The book says the answer is X/2 to the 5th power. ...

8th grade math-exponents

I can't quite write the problem, so I'll try to explain it as best I can. In exponents and in fractions... (X/2) to the 3rd power times (X/2) to the 4th power...all over,or divided by, (X/2 to the 3rd power) to the 2nd power. The book says the answer is X/2 to the 5th power. ...

Math

On Joe Martin's graduation from college, Joe's uncle promised him a gift of $12000 in cash or $900 every quarter for the next 4 years after graduation. If money could be invested at 8% compounded quarterly, which offer is better for Joe? I have done this problem but I keep ...

math

I need help with this problem. If someone can do it step by step that would be great. I can't get the problem correct? I keep getting 26. 3 - 1/8a = 1/4 the book says it's 22.

AP Chem

Calculate the number of atoms in 32.0 g Br2. I keep getting 1.20 * 10^23 atoms Br2 but my book says i'm wrong.

geometry

For Chapeter 10. Section 7 in the workbook how would you work those problems because I have been looking at the tips in the book that explains what to do but as I try to apply those methods my answer seems to get tangled up from the way in the actual book?

Algebra Zero Product Rule

I'm working with the zero product rule and I've somehow lost my way on a certain problem pattern. (x+8)(x-3)= -30 Is the pattern and the answer in the book says -2 or -3, but when I do the problem... x²+5x-24= -30 x²+5x+6= 0 (x+6)(x-1) x= -6 x= 1 That is how I factored it. ...

Maths

given (e^x)sin3x = Im((e^x)(e^i3x)) Integrate (e^x)sin3x.dx You can just take the imaginary part of the integral of ((e^x)(e^i3x))= e^([3i +1)x] which is IM(3i +1)e^(3ix + x) = IM (3i +1)e^x*e^(3ix) = IM {(3i +1)*e^x* [ cos (3x) + i sin (3x)] = e^x* sin (3x)+ 3 e^x cos (3x) ...

math,correction please..

(x)/(x-2) - (x+1)/(x) = (8)/(x^2-2x) I keep getting x = 6 can someone show me how you guys are getting x = -10 The lowest commond denominator is x(x-2) x/x *(x)/(x-2) - (x+1)/(x) *(x-2)/(x-2)=(8)/x(x-2) multiplying both sides by the common denominator.. x^2 -(x^2-1x -2)=8 x+2=...

ENGLISH!!!!!

Candy's dog represents Lennie and the fact that the dog was shot foreshadows the end of the book when Lennie is about to get shot. In the sentence above, does the part that says "...foreshadows the end of the book when Lennie is about to get shot." does it have to be in the ...

English

Your are future seeds. What is your future hope? Jihyeon's future hope is to become an announcer. Write down what she had to do the achieve her dream. 1. I will try to read a book every day. 2. I will try to drink orange juice from time to time. 3. I will try to get up early ...

Advanced Math

Find DE if D=[-2 4 6] and E=[1 -2] [5 -7 1] [0 4] [-3 4] I followed the example in the book on how to multiply matrices and one I found on the Internet and keep coming up with the same answer which is not one of the solutions given to choose from. WORK: [(-2)(1)+(4)(0)+(6)(-3...

chemistry/math problem

One cup of clam chowder contains 9g of protein, 12 g of fat, and 16 g of carbohydrates. How many kilocalories are in the clam chowder. My book says the answer is 210 but I keep getting 208 kcal.

English

THAT is a wonderful idea! A loose leaf notebook where you can organize alphabetically will work beautifully. As you meet a character, give it a page. Then as that character develops, you add information to that page: their alias, characteristics you think important ( greedy, ...

english

Can you please check my work. Adjectives, adverbs ad comparisons. Use 5 adverbs and 5 adjectives to write a review. Compare an event to the subject of review and use 3 comparisons and superlatives. How did I do? I try to keep myself busy and not set around to watch too much T....

Computers

On Open office the word program how do you do headers. Every time i go to insert header it says default and puts the header on every page. The teacher says it has to be .5 on the right hand corner from our second page to the end. Any Suggestions.

bobpursley

ok im doing my physics homework and we have to submit the answers online. i keep getting these questions wrong and i only have one more try can someone please tell me how to work it? a 2.5 kg otter starts from rest at the top of a muddy incline 94.6 cm long and slides down to ...

Calculus and Vectors

In triangle RST, RS=4, RT=7, and ST=5. Determine the measures of the angles to the nearest degree. I solved correctly for T's angle of 34 degrees. Once I try using the sine law to solve for angle S, I keep getting 78 degrees, when it's supposed to be 102 degrees. I tried ...

physics

A Bulldog is already moving when we first see it. It waddles -57 meters reaching a final velocity of -28 m/s after accelerating at -4 m/s2. WHAT WAS THE DOG'S INITIAL VELOCITY? Every time I try to use v^2= V0+2a(delta x) I end up getting a very big value. Could you help me out?

math

How do you write a simplier problem for 23 x 20 ? I do not understand what the book says and my teacher want explain it the way it shows in the book? PLEASE HELP!!!!

Algebra

- ok... we keep getting this one wrong: Solve the following equation for x. Write your answer as a fraction in simplest form. -6(x-5)=-2x-8-6(3x-5) What is it you don't understand about this? Clear the parentheses, combine terms, solve for x. Ive been doing that but i keep ...

Geometry

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck

jishka

A fisherman's scale stretches 2.8 cm when a 3.7-kg fish hangs from it. (a) What is the spring constant? (b) What will be the amplitude and frequency of vibration fi the fish is pulled down 2.5 cm more and released so that it vibrates up and down? I have a question about ...

physics

A fisherman's scale stretches 2.8 cm when a 3.7-kg fish hangs from it. (a) What is the spring constant? (b) What will be the amplitude and frequency of vibration fi the fish is pulled down 2.5 cm more and released so that it vibrates up and down? I have a question about ...

Math

how do you solve this I keep trying and I keep getting the wrong answer. I keep getting x=19000 and that is not correct .10=.9(x/15000)+.14[(1-x)/15000]

Math(dispute to previous question)

2)Name the sets of numbers to which 457 belongs. (answer)natural,whole,integers,rational,reals My book says that every REAL number has to be rational or irrational. Blueridge said that my answer was correct except to exclude rational from my list. From what my book says I HAVE...

math

For y(x)=ln(3+x2), find y`(6) I keep getting 12 but it says that its the wrong answer, really stuck here

Math

The teacher says the correct answer for 18x24=432. How is it I keep getting 532.

chemistry

I am trying to calculate geometry optimization of cyclodextrin, however, the computer always show error 2070 in gaussian. I used sem-empirical pm3 and try pm6, and tried to find any method to do this work, but every try could not work. I hope any body on Jiskha can give me ...

Math

1. You have 3500 in savings for 9 months at a rate of 4.5%. How much will you have at the end of that time? Ans. my book says: 3,618.13 I come up with: 118,125 2. Scale reads 1 inch = 24 inches for a house window. If window measures 1 3/4 inches, what is the actual length? Ans...

Algebra

4x+2>6x-1 > This should be a greater then or equal to sign in the equation. I am getting -3/-2 The book says 3/2

math,correction,plz

Evaluate (15-5)/[((12)/(2*2))-2] my answer that i keep getting is 1 am i even correct or completely wrong The ans is 10 see i had that for the answer but when i revised the rule for order of operations. it says to divide first then multiply left to right and that's whats ...

poem

Is this a good title? Believe in yourself If there ever is a time That you shall fall Pick yourself up And stand up Be proud who you are Every single day Believe in yourself And you succeed that way Think about your future Think about your dream Push yourself forward And try ...

Pre Cal

Let me try again, because I keep getting something different. This is the problem: ( (2x^-4y-1)(2y^4z^-1) )^-2/2yx^3z^0 Can you please help me simply this. I didn't get what you got. Thanks.

Language

The book says:" Add as many prefixes as u can to the word "form". Try to make at least 5 words.

Math--Proportions

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck

books

Book: The Trouble with Lemons At the end of Chapter 16, a character says "it's harder to hate a guy when you see that he's got problems like everbody else." Who says this? Explain what is going on in the novel before, during, and after this is said.

Chemistry

Regarding previous post: I don't understand what I'm doing. My book says the answer is .50 M Ba(NO3)2 but I'm not getting that.

Pharmacy Math

Calculate amount of IV fluid to be added to the volume control chamber. Ordered:D5W at 30 mL/hr for continuous infusion with medication x 60 mg every 6 hours to be infused over 20 minutes by volume control set On hand:Medication x 60 mg/2 ml The book says 8 mL but I'm getting ...

Probability

A card is drawn from a standard deck of cards. Find P(A U B) in each part. A= {getting a heart}, B= {getting an even number} A= {getting a club}, B= {getting a red card} A= {getting an ace}, B= getting a black card} A= {getting a prime}, B= {getting a diamond} Can you please ...

Pre-Algebra

I need work the answer is 5 but i keep getting 4.5 if anyone can help me on the rest i got a page of work! 2y=20-4x*0

Algebra

I'm having trouble with inequalities. Basically my problem is about which way the sign goes. Here's an example.. X(X+1)>2 so then it becomes X^2 + X>2 Correct? Then X^2 + X - 2>0 then factor so it becomes (X+2)(X-1)>0 And so I end up with X>-2 and X>1 as my ...

English

I've been reading the book but am having major trouble getting through it because of the way it is written. I need to know three major events in the book but cannot pinpoint them because I just don't understand the dialect.

MAth

I keep getting -28/19 for this problem, but it doesn't check with the solution in the back of the book. Help please.. solve the equation 7d-(1/2)(2d-4)=(-5/4)(d+4)

physics

ok i'm putting in physics it'll most likely change it watch A fisherman's scale stretches 2.8 cm when a 3.7-kg fish hangs from it. (a) What is the spring constant? (b) What will be the amplitude and frequency of vibration fi the fish is pulled down 2.5 cm more and released so ...

Math

5a+6b/2 minus 5a+6b/2 The answer is suppose to be 6b. When I try and solve it I keep getting 0 for my answer.

Math (please please please help!)

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck

science

At a construction site a pipe wrench struck the ground wiht a speed of 24 m/s. a) From what height was it inadvertently fropped? b) How long was it falling? for a) the book said it was 29.4m and for b) it was 2.4s but I keep on getting the wrong answers. s=(1/2)gt^2 v=g*t g=9....

Math analysis

I have a problem that says to Use the laws of logarithms to expand and simplify the expression. ln(x(x + 1)(x + 2)) .. I keep getting ln(x)+ln(x^2+3x+2) but I'm wrong. What im i doing incorrectly?

Physics

What, roughly, is the percent uncertainty in the volume of a spherical beach ball whose radius is r=4.84±0.05m? I keep getting 6% and it says i am wrong.

Math

You have cards numbered 1-10 and a number cube what are the odds of getting two prime numbers? The book says 1\5 but how do they get it.

Chem

81. Formic acid HCHO2, is a convenient source of small quantities of carbon monoxide. When warmed with sulfuric acid, formic acid decomposes to give CO gas. HCHO2(l) -> H2O(l) + CO(g) If 3.85 L of carbon monoxide was collected over water at 25 degrees C and 689 mmHg, how ...

Derivatives

If g(x) = tan (5x2), then g ′(x) = ? I've worked this problem out like four times already and I keep getting a complete different answer..So I think I'm doing it wrong. I keep getting these.. g'(x)= cosx^2 5tan g'(x)= 2cosxtan^2

Chemistry

If the solubility of Ag2CO3 is 1.3×10^-4 mol/L what is the Ksp? I'm trying to do it but my answer I keep on getting is wrong and doesn't match the text book which is 8.8×10^-12

Physics

A curve of radius 59.9 m is banked so that a car of mass 1.4 Mg traveling with uniform speed 50 km/hr can round the curve without relying on friction to keep it from slipping on the surface. At what angle is the curve banked? The acceleration due to gravity is 9.8 m/s2 * I ...

physics

You can keep a 3 kg book from dropping by pushing it horizontally against a wall. What force must you apply to the book to keep it from falling? What is the coefficient of static friction?

Math

A carpenter agrees to work under the conditions that he is to be paid $5.50 every day he works, but must pay $6.60 every day he does not work. At the end of 30 days he finds he has paid out as much as he has received. How may days did he work?

math

6c=___pt Can someone show me steps please? You look up the conversion factor. There are two ways it can look; i.e., 2 cups = 1 pint OR 1 pint = 2 cups. Here is the way to do ALL conversions. ??pts = what you are given x conversion factor. ??pts = 6 cups x factor. So how do we ...

english

can you please tell me if these sentences make sense. im talking aboout the book the great gatsby. Change is inevitable to time, however, majority of us deny it. If we lose something in the past that we have admired, we sometimes in future try to replicate it. To look at this ...

MATHS REINY

You had helped me with a similar question. This one says : A whole seller supplies 90 books while he was ordered to send 80 books by a retailer. If 15%trade discount was given, what was the net discount to the retailer? I solved this one in the similar way to the one you ...

maths reiny help!!

You had helped me with a similar question. This one says : A whole seller supplies 90 books while he was ordered to send 80 books by a retailer. If 15%trade discount was given, what was the net discount to the retailer? I solved this one in the similar way to the one you ...

basic Integration

I have three questions which I apparently have 'wrong' according to the book, but I've done lots of other questions which I've gotten right using the same method and I have triple checked these answers for these three questions so I was wondering if someone could tell me if I ...

algebra

interest formula, and or answer. if you put $200.00 in an annuity that grows at 6% interest per year at the end of every year, and you add $200.00 more at the end of every year, how much will you have at the end of 70 years. I know prt, but it doesn't work. is this pertaining ...

chemistry

The pH of a 1.00 10-3 M solution of pyrrolidine is 10.82. Calculate Kb. i keep getting anumber that is ^ (positive) and that's way to big....

Chemistry

Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Mg2 ] = 0.763 M and [Sn2 ] = 0.0180 M Mg(s)+Sn^2+(aq)-->Mg^(2+)+Sn(s) I keep getting 2.57 but it says I'm wrong. Please help me!

Chemistry

Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Mg2 ] = 0.763 M and [Sn2 ] = 0.0180 M Mg(s)+Sn^2+(aq)-->Mg^(2+)+Sn(s) I keep getting 2.57 but it says I'm wrong. Please help me!

College math

I'm supposed to substitute (3+h) into the equation 3t^3-2^t+8. I keep getting 3h^3-h^2+80 but it says that's incorrect and the real answer is 3h^3+26h+75h+80. Can somebody explain how they got that?

Algebra 2

4a+2b+c=10 100a+10b+c=12 16a+4b+c=12 I need help to solve this problem. I keeping getting A=1.70 B=2.0 and C=5. My book says that is wrong, could you show me how to get the correct answer?

Calculus

ã6(2ã6 - ã5) How do you get 12-ã30? I keep getting a way different answer:\ Btw not sure if the radicals will show up.

english

can you please help me make my three senences advanced. im talking about two ways of becoming rich really fast if yourfrom a middle class family. im writing these senetnces for an essay on the book, "the great gatsby." There are two ways of getting wealthy really quick; the ...

motorised gates

Try this website: http://www.howstuffworks.com/ Try different search terms until you find what you're looking for. =) how do they work ? A trick many employ to open and close gates: they use an endless helical drive screw, so the motor turns the screw only one way. It has ...

Algebra 1

Which statement about real numbers is true? Across the heading says: real numbers. The first big circle says: rational numbers The second biggest circle inside rational numbers says: integers The third circle within the rational numbers says: whole numbers. Then there is a ...

Chemistry

Find the pH of a buffer that consists of 0.82 M methylamin (CH3NH2) and 0.71 M CH3NH3Cl (pKb of methylamine (CH3NH2) = 3.35.) I keep getting 3.41, but it says that it's wrong...

biology

Julie took her lunch to work every day. She wanted to know what type of insulation would keep her lunch the coolest. Each day, she took her lunch in a different container: a Styrofoam cooler box, a plastic cooler box and a soft insulated lunch bag. She measured the temperature...

English

Can you please put this into iambic penatmeter: It is the end of time as we know it The end of four years is coming very near It is time to look at my yearbook a bit, It's the yearbook of my past times, so dear Iambic pentameter sounds something like this: da-DA da-DA da-DA da...

psych

identify if it is Fixed Ratio (FR), Variable Ratio (VR) Fixed Interval (FI) Variable Interval (VI) VR 1. Getting paid for every widget you put on a machine in a factory VI 2. Pop (surprise) quizzes VR 3. Slot machines at Foxwoods casino FI 4. Getting to play computer games ...

Math

lim 200 (30-t)^2 h->0 t=10 The answer should be -8000, but I keep getting -80,000 because I have to do it the long way.

calculus 2

Integral of 63x(cos(x))^2 dx I got: 63x^2/4 +63sin(2x)/4 +63cos(2x)/8 +C I keep getting this answer but the online site says it's wrong.

English

Okay, another question on the Diary Of A Young Girl by Anne Frank. In the book, Anne says this statement: "There is nothing we can do but wait as calmly as we can till the misery comes to an end." How does this statement help to place readers in the historical con-text of the ...

physics

i keep trying to put this in my calculator but i keep getting the wrong answer...can someone please try it on their calculator and help me? thnks (a) Find the distance r to geosynchronous orbit. Apply Kepler's third law. T^2=((4pi^2)/(GM_E))r^3 Substitute the period in seconds...

physics,

A student presses a book between his hands The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 30.8 N. The coefficient of static friction between his hands and the book is 0.424. To keep the book ...

Physics

A student presses a book between his hands. The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 31N. The coefficient of static friction between his hands and the book is 0.40. To keep the book ...

English-Writing

Can someone tell me when you use both a double and single quote mark in an essay. We are writing an essay with quotes from a book, and in the example sometines it shows "'I had every reason to ...'" and other times it's just "I had every reason to believe..." It says single ...

Physics

A mechanical device requires 420 J of work to do 230 J of work in lifting a crate. What is the efficiency of the device? I keep getting 0.5% am I right?

physics

I keep geting this question wrong and cant figure out what i am doing wrong. Help please. When you push a 1.75- book resting on a tabletop, it takes 2.23 to start the book sliding. Once it is sliding, however, it takes only 1.45 to keep the book moving with constant speed. ...

math!!

Find the value of x. x / x+5 = x-4 / x the book says the answer is 20, but im not getting that. I crossed multiplied and got x^2=(x+5)(x+4) and then multiplied that out x^2 = x^2 + 9x+ 20 and then 9x=20.. what am I doing wrong?

Physics

A student presses a book between his hands, as the drawing indicates. The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 32 N. The coefficient of static friction between his hands and the book is...

maths

Formalize the following english statements as quantified WFF. Let S(x) be the predicate "x is a student," B(x) the predicate "x is a book," and H(x,y) the predicate "x has y, " where the universe of discourse is the universe, that is the set of all objects. Use quantifiers to ...

algebra

I need help showing me how to do some problems.. 5. 28-0.3y = 0.7y-12 I got 10/400 or 0.025.. and 3c-4c+1=5c+2+3 I ended up getting c=1 but the book says it's wrong too.. What am I doing wrong?

physics

A student presses a book between his hands, as the drawing indicates. The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 30.0 N. The coefficient of static friction between his hands and the book ...

Physics

You are holding a shopping basket at the grocery store with two 0.51 kg cartons of cereal at the left end of the basket. The basket is 0.73 m long. Where should you place a (1.8 kg) half gallon of milk, relative to the left end of the basket, so that the center of mass of your...

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