Friday

April 18, 2014

April 18, 2014

Number of results: 41,657

**Math**

We have an important chemsitry test due and I want to make sure that I do not mess up on my algebra. I am dealing with the integrated rate law, but my question is purely algebraically in nature. I hope, somebody can help me. 1) ln(A) = -kt+ln(B) solve for t solve for k solve ...
*Monday, May 13, 2013 at 10:33pm by Yasemine*

**Algebra**

Solve for x: h=(k/4)(x-3L) Solve for B: v-6Bxk=7B Solve for S: z+(1/7)sk=(1/6)yk^2 Solve for x: 3F=10hx+10hv+10xv
*Thursday, February 13, 2014 at 3:33pm by Daniel*

**Math**

How do you solve for d? 16d - (4 - 5d) = -67 How do you solve for m? 2/7(4m - 18) = 12 How do you solve for b? 1/4(5b + 11) = 19 How do you solve for x? -5/6(9 + 2x) = 40
*Thursday, September 26, 2013 at 6:33pm by DIana*

**physics**

solve for acceleration d=1/2 a t^2 solve for a, then f=ma solve for f. Then, knowing F f=kx to solve for a
*Thursday, November 12, 2009 at 10:46am by bobpursley*

**algebra**

Solve the indicated variable: 1. Volume of a cone: solve for h: V=¨ir^2h/3 2. Temperature formula: solve for C: F=9/5C+32 pleaseeeee help me solve these! plzzz! i have nooo idea how to do these. THANKS! =)))
*Sunday, September 20, 2009 at 4:34pm by kitty kat*

**algebra**

there are so many ways of doing this problem! you can solve for x or y. let's solve for x. take -4x+y=41 when u solve x= 1/4y-41/4 plug that value of x into the other equation: 6x+3y=-21 it should look like this 6(1/4y-41/4)+3y=-21 and solve for y after u solve for y plug it ...
*Friday, February 24, 2012 at 9:17pm by luther*

**math**

actually, in a addition to the question i posted a few minutes ago, can someone please help me with a few actual specific questions? thanks so much i'm very confused and i've been working on these all day. *Literal Equations* ~solve for x ax + bx = 8ab ~solve for y my - ny = m...
*Friday, October 26, 2007 at 2:58pm by kim*

**MATH PLEASEEEEE**

I have a question, if f(x)=x/2 and g(x)=3x+1 find: a) (f+g)(x) i know you go x/2+3x+1. but how do i solve that?? b) (f-g)(x) i know you go x/2-3x+1, how do i solve? c)(f*g)(x) how do i solve? (f/g)(x) how do i solve?? f(g(x)) how do i solve?? thanks for your itmeee
*Tuesday, December 16, 2008 at 5:38pm by Jamie Lynn*

**Physics**

solve for the spring constant: k=Force/distance. then, solve for the new displacement 41=k * x solve for x
*Wednesday, July 21, 2010 at 4:22pm by bobpursley*

**Chemistry**

a) ln(No/N) = akt No = 1.5M solve for N a = 2 k = 0.00255 t = 2.5 min changed to seconds. b) same as in (a) but solve for t. c) Make No = 1.5 and N = 1/2 that, solve for t.
*Monday, January 24, 2011 at 11:54pm by DrBob222*

**algebra**

solve for the indicated variable: a. temperature formula solve for F: K=5/9(F-32)+273 b. annual interest rate solve for R: A=P+Prt
*Thursday, September 24, 2009 at 3:02pm by narmin*

**Math**

Solve for S: r^2s-5s=7. Solve for b: L= 4a^2b. I'm confused about how to solve these problems. Could someone show me the steps?
*Monday, September 12, 2011 at 3:23am by Sue*

**physics**

first find the terminal velocity distance=1/2 a t^2 solve for a then, vf= at Then solve for the braking acceleration 0= vabove*2 +2ad solve for a
*Monday, January 27, 2014 at 9:50pm by bobpursley*

**Pre-Algebra**

You've been shown how to solve these types of problems multiple times. It's like someone explains to you how to solve x + 1 = 5, but then you create another post because you don't know how to solve x + 1 = 6, and the another post because you don't know how to solve x + 1 = 7, ...
*Thursday, May 7, 2009 at 4:00pm by RickP*

**Pre calculus**

How do I solve this exponent problem? I understand the exponent rules, but I getting 1 but 1 is not the answer! I don't want anyone to solve the problem for me, I want to learn how to solve this type of problem. Thank you! Solve the equation: -8=-3-6 (3sqrtx^2) Thanks again!
*Wednesday, March 27, 2013 at 5:47pm by anon*

**Algebra 2**

Solve each system 3x+2y= -2 9x- y= -6 I know how to solve for x but i get really lost trying to figure out how to solve for the second variable
*Thursday, September 11, 2008 at 8:07pm by Rachel*

**Substitution Method-Plz help**

Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=-4 (y+2) + y = -4 solve for y. Then, x= y+2 i don't get it.How did you get that?What does x equal? re read...
*Tuesday, October 17, 2006 at 3:34pm by Svetlana*

**Algebra**

How do I solve this? ((1/t) - 1)/ (t -1) NO CLUE :) :) :) :) :) :) :) :) :) :)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1 How do I solve this? ((1/t) - 1)/ (t -1) 1/t - 1 = 1/t - t/t = (1/t)(1 - t) = (-1/t)(t - 1) The two t - 1 terms cancel each other out, leaving ...
*Thursday, February 15, 2007 at 1:12pm by Lisa*

**MATH PLEASE HELP!**

Solve each system 3x+2y= -2 9x- y= -6 I know how to solve for x but i get really lost trying to figure out how to solve for the second variable
*Thursday, September 11, 2008 at 8:14pm by Rachel*

**English**

1. He can not solve the math problem. 2. He cannot solve the math problem. 3. He can't solve the math problem. 4. He could not solve the math problem. 5. He couldnot solve the math problem. 6. He couldn't solve the math problem. (Are they all grammatical? What about #5? Is it ...
*Tuesday, July 16, 2013 at 12:51am by rfvv*

**SOLVE THE INEQUALITY **

It just says solve it and then graph it...
*Wednesday, October 27, 2010 at 10:10pm by PLEASE HELP SOLVE THIS *

**Algebra**

FIND THE GCF OF THE PRODUCT (3B+6)(2B-10) SOLVE... X^2=-6X x(x+6)= 0 x = -6 or 0 it would = 0 help me solve this problem.. solve for W: 2L+2W=38 please and thank you!
*Tuesday, June 26, 2007 at 10:32am by Tomika*

**math**

solve for the indicated variable: a. temperature formula solve for F: K=5/9(F-32)+273 b. annual interest rate solve for R: A=P+Prt can you please show how to do these? thanxx =)
*Thursday, September 24, 2009 at 9:54am by narmin*

**Math**

they are the same. "Solve f(x)=0 for x" is redundant. Since you only have one variable, you can't solve for anything else. Solve f(x)=0 means to find a value for x which makes f(x) zero.
*Wednesday, August 15, 2012 at 9:01pm by Steve*

**Algebra II**

How do I solve the following problems?? 1. Factor: 4x^2-100y^2 2. Factor: 3x^2+27 3. Solve 3x^2+9x=0 4. Solve 12^2+30x=-12 5. 9a(a+1)=4 6. Solve 16x^2=25
*Wednesday, June 29, 2011 at 2:29pm by Nicole*

**Math Analysis**

6. Prove that f(x) = (3/4)x^4 + 2 and g(x) = (4sqrt(108x-216))/3 are inverses. I know you solve it with composite functions f(g(x)) and g(f(x)), and I solved f(g(x)), but I can't seem to solve g(f(x)) to equal x, like it should. Can someone show me how to solve this? Thanks :)
*Saturday, October 24, 2009 at 8:42pm by Emily*

**math**

solve each equation for 0=/<x=/<2pi sin^2x + 5sinx + 6 = 0? how do i factor this and solve? 2sin^2 + sinx = 0 (2sinx - 3)(sinx +2) sinx = 3/2, -2 how do I solve? These are not part of the special triangles. 2cos^2 - 7cosx + 3 = 0 (2cosx - 1)(cosx - 3) cosx = 1/2, 3 x= pi...
*Sunday, February 15, 2009 at 7:54pm by sh*

**chemistry -- radioactive decay**

k = 0.693/t1/2 Solve for k. ln(No/N) = kt No = 150 N = solve for this k from above. t = hours for t and solve for N in grams.
*Tuesday, September 18, 2012 at 11:53pm by DrBob222*

**Physics/Science**

A startled armadillo leaps upward rising 0.547 m in the first 0.202 s. (a) What is its initial speed as it leaves the ground? _____m/s (b) What is its speed at the height of 0.547 m? _____m/s (c) How much higher does it go? _____m Use distance vs time: d=vi*t - 1/2 g t^2 solve...
*Thursday, January 25, 2007 at 5:48am by TechnoBoi11*

**algebra**

how would i work out the following problems solve each formula in terms of the given variable 1. 5d-2g=9 ;g The formula A=2h(l+w) gives the lateral area a of a rectangular solids with length l, width,w and height h. 2. solve this formula for h 3. solve this formula for l The ...
*Monday, September 22, 2008 at 6:15am by jessica*

**Algebra 1- Math**

What do yo mean by solve? Solve for x in terms of y? solve for y in terms of x? find an (x,y) which satisfies the equation?
*Tuesday, February 5, 2013 at 3:36pm by Steve*

**maths**

(a) Take the derivative and solve for x when y' is 0. Evaluate y at that value. (b) Solve the equation for x when y is 0. --- Alternatively, note that a ballistic curve of that form (quadratic) is symmetric around the maxima/minima and use the solution of one to solve the other.
*Sunday, September 1, 2013 at 2:32am by Graham*

**Rational Zero Theorem**

I know how to solve if the leading coefficient is 1, but how would i solve it if its not 1. Ex. f(x) = 2x^3 + 7x^2 - 7x + 30 Can someone help me start that out? Then I'll use synthetic divison to solve for it.
*Tuesday, January 13, 2009 at 12:32am by Chopsticks*

**Chemistry!!**

P1V1/T1=P2V2/T2 solve for V2 Now, now many moles... PV=nRT solve for n OR, when you solve for volume at stp, divide by 22.4liters
*Tuesday, May 11, 2010 at 6:23am by bobpursley*

**Algebra II**

1.Solve: x(x2 + 16) = 0 2.Solve: 2x3 + 6x2 – x – 3 = 0 3. Solve: 2x = x2
*Friday, January 11, 2008 at 9:11pm by Christian*

**math**

B+G=33 B-5=G or B+G=33 B-G=5 then solve. I would solve by adding the equations, or 2B=38 then solve.
*Tuesday, December 6, 2011 at 7:28pm by bobpursley*

**Math**

Use your knowledge of exponents to solve. a) 1/2^x=1/(x+2) b) 1/2^x>1/x^2 So I know that these functions are rational functions.. and I am trying to solve for x. I tried to solve them by I keep getting stuck with the exponent 2 which is the exponential function.. Help please
*Sunday, June 7, 2009 at 5:13pm by Halle*

**math**

Eight subtracted from six times a number is -134. What is the number? A) Translate the statement above into an equation that you can solve to answer this question. Do not solve it yet. Use x as your variable. solve for x
*Thursday, February 21, 2013 at 1:33pm by kelly*

**Math**

How do I solve these problems, I really need help. Solve by substitution method 6x+5y=17 x=53-8y Solve by elimination method 2x+3y=5 4x+6y=10
*Friday, October 17, 2008 at 11:08pm by Amy*

**algebra**

solve for the indicated variable: a. temperature formula solve for F: K=5/9(F-32)+273 b. annual interest rate solve for R: A=P+Prt im posting this the second time, but the first reply i got didn't help much :( can you show me how to do at least one of these?? thanks
*Thursday, September 24, 2009 at 11:27am by narmin*

**math**

x * y = 7 x - y = 5 One method: express one variable in terms of the other variable and then solve the single variable expression. If x - y = 5 then y = x - 5 substituting back into the first equation: x * (x - 5)=7 Solve for x, then substitue the x value into either equation ...
*Thursday, October 2, 2008 at 5:50pm by Quidditch*

**algebra**

i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y - 1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations by substitution. x^2 + y^2 = 25 x - y = 7 3) ...
*Tuesday, April 5, 2011 at 10:27am by Alyssa*

**physic**

All use the kinematic equations, which you should have memorized by now. 1) horizontal: 98=vcos45*t solve for time in terms of v th en put that time in the vertical equation 0=0+vsin45*t - 4.9t^2, and solve for v. 2) Same equations, start with vertical, solve for time, then in...
*Sunday, November 11, 2007 at 7:07pm by bobpursley*

**physics**

time to fall 1.13m 1.13=4.9t^2 solve for t, then use that t to find the initial horizontal velocity of the block/bullet 1.76=v'*t solve for v' then conservation of momentum... (m1+m2)v'=m1*v solve for v.
*Sunday, October 18, 2009 at 2:29pm by bobpursley*

**Math help please**

1. Solve for x. 4(x - b) = x b = 4/3x b = 3/4x x = 4/3b x = 3/4b 2. Solve for y, then find the value of y when given x = 2. 6x = 7 - 4y -12 7/4 19/4 24 I need help solving these. Can you please explain how to solve these problems?
*Wednesday, October 2, 2013 at 6:52pm by Charlotte*

**chemistry**

k = 0.693/t1/2. Solve for k and substitute into the below equation. ln(No/N) = kt. No = 100 (or any number you choose) N = Solve for this. k = from above t = 365 days. Solve for N, then 100/N = fraction remaining. Another way is to simply solve for No/N and take the inverse of...
*Thursday, July 7, 2011 at 7:49pm by DrBob222*

**Chemistry**

mols glucose = g/molar mass Solve for mols. m = mols/kg solvent Solve for m delta T = Kf*m Solve for dT and subract from zero C.
*Tuesday, July 17, 2012 at 10:49pm by DrBob222*

**Math - Algebra**

Simplify and solve for x=2 and y=5. Please remember to group like terms. 1. 3x - 2y + 4x -3y 2. y + x - y - x 1. 3x2 - 2x5 + 4x2 - 3x5 6 - 10 + 8 - 15 2. 5+2-5-2 7-5+2 yah i think that's how to solve it, basically sub in the x and ys and solve
*Thursday, May 17, 2007 at 11:09pm by Taariq*

**Precalculus**

Explain how to do these please. 1. solve x=log(base2)*1/8 by rewriting in exponential form. 2. Solve log(3x+1)=5 3. Solve log(base x)8=-1/2
*Sunday, January 29, 2012 at 12:45pm by Melinda*

**subsitution method**

Can some one show me how to use the Substitution method to solve the system of these equations. x + y = -4 x - y = 2 x + y = 10 y = x + 8 on the first set. Solve for either x or y in either equation, then put that value into the other equation. Example: x + y = -4 x - y = 2 ...
*Sunday, July 1, 2007 at 9:13am by mike*

**Intermediate Algebra**

Combine like terms: -3x^2+2x-4x^2-9+6x-2x^2+8 Solve for x: 8x-11= -11x+18 Solve for x: -2(x-5)+7=z-8-5x Solve for x: (x-2)/5 - 3/2= (x+1)/10 Translate to an algebra statement; do not solve: Seven times the difference of six and a twice a number yields the same result as the ...
*Saturday, September 29, 2007 at 10:42pm by Dawn*

**math**

Solve systems by substitution 5x - 2y = -5 y - 5x = 3 Substitute 5x + 3 for y in the first equation, and solve it for x. Once you have x, use either of the two equations you wrote to solve for y.
*Wednesday, August 8, 2007 at 1:36am by Robin*

**Chemistry**

delta T = i*Kf*m where i = 2, solve for m. m = moles/kg solvent Solve for moles. moles = g/molar mass solve for grams.
*Friday, January 27, 2012 at 4:39pm by DrBob222*

**calculus**

I am suposed to apply L'Hospitals rule to solve. I can't seem to solve it tho. could someone explain the steps to me? Thanks! the limit as x approaches infinity of: xe^(1/x)-x This is what I got so far: xe^(1/x)-x x(e^(1/x)-1) e^(1/x)-1/(1/x) Now its in the right form to solve...
*Tuesday, April 14, 2009 at 11:07am by Riley*

**Algebra II**

Hints: 1. Factor: 4x^2-100y^2 use difference of two squares, (a²-b²)=(a+b)(a-b) 2. Factor: 3x^2+27 the common factor is 3. 3. Solve 3x^2+9x=0 factor and solve: 3x(x+3)=0 therefore x=0 or x=? 4. Solve 12^2+30x=-12 Factor out the 6, and then factor completely to solve ...
*Wednesday, June 29, 2011 at 2:29pm by MathMate*

**Chemistry**

mols solute = grams/molar mass Solve for mols molality = mols/kg solvent Solve for m delta T = Kb*m Solve for dT and add to normal boiling point.
*Thursday, February 14, 2013 at 3:35pm by DrBob222*

**physics**

Lets take the 9 m out of the picture. 16^2=9^2 + E^2 so solve for the Escalator length, E. Now, having E, E^2=6^2+ H^2 where H is the horiontal displcement. Actually, looking at the equations, there is no reason to solve for E 16^2=9^2+6^2 + H^2 solve for H. angle= arctan 6/H ...
*Sunday, October 21, 2007 at 4:07pm by bobpursley*

**math**

solve the following trig equation : 7 = 8sin(1/2)x. I can solve this using the half-angle indentity. But i need to solve this using period and phase change equation. how do i do this?
*Wednesday, April 16, 2008 at 12:01am by shan*

**Math**

Factor the polynomial P(x)=x^3-2x^2-13x-10. Then solve the equation P(x)=0. This is what I got: P(x)=(x+1)(x^2-3x-10) P(x)=(x+1)(x-5)(x+2) When it says solve the equation P(x)=0 does it means solve for x? If so then x=-1 or 5 or -2 Correct??? please and thank you
*Tuesday, April 3, 2012 at 4:13pm by Anonymous*

**Chemistry**

moles C6H12O6 = grams/molar mass Solve for moles. m = mols/kg solvent Solve for m delta T = Kf*m Solve for delta T.
*Monday, February 20, 2012 at 11:13pm by DrBob222*

**Calculus**

queston 1) add the equations to get 7x=14 that gives you x, then put x in either of the equations to solve for y. question 2) solve for x in the second equation, substitute that into the first equation, solve for y.
*Monday, September 10, 2007 at 10:48pm by bobpursley*

**Algebra**

Solving quardratic equations using factoring. 2X^2+2X-4=0 The book says the answer is -2,1. I got the -2,1 but not in the order of -2,1. I used FOIL to solve. When I use -2,1 I don't can not solve. When I use 1,-2. I can solve. I am not clear.
*Friday, May 23, 2008 at 9:04pm by G*

**Math**

I think it is 47184. Solve the hundreds digit first which is 1 + 0 = 1. Then solve for the thousands digit which is 1 x 7 = 7. Then solve for tens digit whichi is 1 + 7 = 8. Then solve for for your ones which 1/2 of 8 so it is 4. Then your ones is the same as your ten ...
*Wednesday, October 17, 2012 at 10:14pm by Brandi*

**chem**

Solve the excess acid first. MolesExcessAcid= moles NaOH VolumeExcess*MolariatyEx= .00468L*.1008 solve for volume excess, then subtract it from the original volume, and you can then solve to antacid titration.
*Tuesday, October 2, 2007 at 12:09am by bobpursley*

**Chemistry**

delta T = Kb*m Solve for m m = mols/kg solvent\ Solve for mol mols = grams/molar mass Solve for grams.;
*Monday, February 25, 2013 at 2:12am by DrBob222*

**Algebra**

91. Find the domain of: y=-3x+1 a. all negative numbers b. x>0 c. all real numbers d. x=3 Can someone please show the work and how to solve this problem. There are many of these in my lessons and I don't understand how to solve them. Do you solve for x?
*Friday, May 7, 2010 at 11:37am by y912f*

**Chemistry**

a. P1V1 = P2V2. Solve for P2 and convert to atm. atm = mmHg/760 b. Use PV = nRT and solve for n = number of moles of fluorine. Then n = grams/molar mass. Solve for grams.
*Saturday, November 19, 2011 at 8:16pm by DrBob222*

**physics**

.125*25=total mass*combined velocity =M+.125)V The time to fall off the head is 1.85=9.8t^2/2 solve for time,t then V*t=8.5 solve for V Put that back into the first equation, solve for M
*Wednesday, October 28, 2009 at 3:28pm by bobpursley*

**Math**

I just don't understand this question: h(t)=A*b^x h(3)=4 h(5)=40 Solve for b Would you plug 3 into the x and set it equal to 4? (4=A*b^3) How would you solve for that because in the next question they go on to ask you to solve for A using the b you found... Almost looks like ...
*Wednesday, August 30, 2006 at 2:35am by Nicole*

**alegbra II**

14. Solve the inquality -3(r-11) + 15 equal or greater than 9. 15.Solve the inequality: -2 < 4z = 10 lessthan or equal to 12. 16. Solve the inequality 2x-5 less than or equal to 10 or 33 - 4x < 5 17. Solve the inequality 3 | m -4 | > 6
*Sunday, May 4, 2008 at 6:48pm by PJ.*

**algebra**

6x-7y=21 Two Answers- x=?, y=? Solve the Equation first for x: x=(7(y+3))/6 plug this back into the equation for xand now because it's one variable (y) you can solve for by itself. Once you have y you can just plug it in to solve for x.
*Sunday, February 21, 2010 at 8:30pm by IndyGirl*

**chemistry**

First mistake. 3.78 = M*0.08205*298 Solve for M. Then M = moles/L L = 0.025, not 24.45. Then you solve two simultaneous equations which I set up earlier. It becomes a math problem then, and not a chemistry problem. I assume you know how to solve two equations simultaneously. (...
*Sunday, January 24, 2010 at 11:30pm by DrBob222*

**Chemistry**

First, you omitted the units on the 9.03 WHAT in a 0.8112 WHAT container. I'm confused because you are confused. There is nothing here that you need an idea about. You have a and b, R, T, and n. Solve for P by van d equation, then use the usual PV = nRT and solve for P. Then ...
*Saturday, January 14, 2012 at 5:46pm by DrBob222*

**Chemisty Help Please!**

mols sucrose = grams/molar mass solve for mols. molality = m = mols/kg solvent solve for m dT = Kf*m solve for dT and subtract from 0.
*Tuesday, January 14, 2014 at 10:52pm by DrBob222*

**Pre-Algebra**

One way to solve these problems is to set up a proportion. 1/4 + x/14 Cross multiply and solve for x. 4x = 14 x = 14/4 x = 3.5 Solve the others the same way.
*Wednesday, February 16, 2011 at 8:18pm by Ms. Sue*

**Pre-Algebra**

Can someone please show me how to solve these problems step-by-step so that I can understand how to do them? 1.Use inverse operations to write a related inequality and solve for the variable: d/6 < 12 2.Use inverse operations to solve the inequality: m-27=85 3.Use ...
*Friday, May 1, 2009 at 3:23pm by mysterychicken*

**math**

To solve, substitute 7-x for y in the second equation and solve for x. Put that value in the first equation to solve for y. Check by putting both values into the second equation.
*Thursday, February 18, 2010 at 9:08am by PsyDAG*

**chemistry**

delta T = Kb*m solve for m m = moles/kg solvent solve for moles. moles = grams/molar mass. solve for grams. Post your work if you get stuck.
*Saturday, June 26, 2010 at 9:52pm by DrBob222*

**Chemistry**

moles ethylene glycol = grams/molar mass. Solve for moles. m = moles solute/kg solvent Solve for m delta T = Kf*m solve for delta T, then for T.
*Saturday, August 21, 2010 at 10:00pm by DrBob222*

**Chemistry**

pH + pOH = pKw = 14. Solve for pOH, then pOH = -log(OH^-). Solve for OH^- OR you can use pH = -log(H^+) and solve for )H^+), then (H^+)(OH^-) = Kw = 1E-14 and solve for OH^-
*Tuesday, February 21, 2012 at 9:23pm by DrBob222*

**5th grade**

821213 4243 __________ Place the numbers like this then solve 821213*3, then go on to the next line and place a 0 under the last number of your previous answer, then solve it for 821213*4, then under this add two 0s and solve it for the 2, then three 0s underneath that and ...
*Tuesday, August 10, 2010 at 10:04pm by S*

**Algerbra**

solve for x ac+x=xy have all terms with x on one side ac=xy-x take x as common factor ac=x(y-1) now solve for x 25a^2 - 9b^4 can u please help me solve and check these equations
*Tuesday, September 26, 2006 at 8:50pm by Mark*

**Chemistry**

moles biphen = grams/molar mass Solve for moles. m = moles/kg solvent. Solve for m = molality delta T = Kb*m Solve for delta T, then add to 100 to find the new boiling point.
*Wednesday, February 29, 2012 at 4:07pm by DrBob222*

**Algebra 2**

How do I answer this f(x) = x - 3 (x + 4)^(1/2) and am asked how to solve for x when y = -5 I have no idea how to do this and know that I could just solve it by guess and checking but I want to know how to do this algebraically when plugging in the -5 and trying to solve for x...
*Tuesday, May 26, 2009 at 5:39pm by Dylan*

**math 12**

i got the wrong answer from the back, and i know that imnot dooing it right. please try to help me on this hard question. THE ANSWER WAS:16 solve the equation: 3log(x-15)= (1/4)^x i dont know how to solve it algerbrically. the teacher doesn't want us to solve it graphically. ...
*Thursday, June 2, 2011 at 7:48pm by kajal *

**algebra**

How do I solve this problem? (4x + 2)(x-3)=0 Set 4x+2 = 0 and solve for x. set x-3 = 0 and solve for x. You will have two answers for x.
*Thursday, May 3, 2007 at 8:51pm by pat*

**Math**

it means nothing to say "solve ln(3/4)" There's nothing to solve. It should say something like "evaluate ln(3/4) as a sum of logs of integers" or something Check examples in the same section of the text to see what they mean. If it's a stand-alone problem, question the teacher...
*Tuesday, September 11, 2012 at 10:57pm by Steve*

**CHEM- FP**

delta T = i*Kb*m Solve for m molality = moles/kg Solve for moles moles = grams/molar mass Solve for grams.
*Saturday, October 9, 2010 at 4:45am by DrBob222*

**Physics**

the path of the particle has length PI/2 * radius. velocity of the particle: PI*radius/2timegiven=60m/s solve for r Knowing the velocity as that, solve for r. centripetal force=mv^2/r then magnetic force, Bqv, solve for that as it equals centripetal force. then solve for q.
*Thursday, April 4, 2013 at 4:14pm by bobpursley*

**chemistry**

I would do this. Use E = hc/wavelenth. Plug in 93.77 nm and solve for E in joules, then use dE = 2.180E-18*(1/1 - 1/x^2) and solve for x. I think you will get 6. That is where the electron has been lifted; i.e., to n = 6. Then E = hc/wavelength and substitute 1100; solve for E...
*Wednesday, October 2, 2013 at 1:03am by DrBob222*

**Maths**

solve the following pair of simultaneous equation: (x/a)+(y/b)=1 (x/b)+(y/a)=1 can someone help please?i have no idea how to solve it =( x/(ab) + y/b^2 = 1/b x/(ab) + y/a^2 = 1/a Subtract one from the other y(1/b^2 - 1/a^2) = 1/b - 1/a y(1/b + 1/a)(1/b - 1/a) = (1/b - 1/a) ...
*Wednesday, July 11, 2007 at 4:18am by Emma*

**chemistry**

mols saccharin = 0.115g/molar mass Solve for mols. m = mols/kg solvent m = mols/0.001 solve for m delta T = Kf*m Solve for delta T and subtract from 0 C to find the melting point.
*Tuesday, September 11, 2012 at 8:33pm by DrBob222*

**Trigonometry**

Hi, I really need help in understanding how to solve trig equations. How do you solve this equation? Solve the equation on the interval 0 < or equal to x < or equal to 2pi. sinx = (square root of 3)/2 I appreciate your help. Thank you!
*Sunday, March 17, 2013 at 2:18pm by Leah*

**algebra**

im trying to solve a literal equation, then solve the specific question first part is stumping me, im to solve for X ax=bx-c this is what I got ax-bx=c, but don't know how to get x by itself
*Tuesday, September 3, 2013 at 7:48pm by aaron*

**chemistry**

Some of your "characters" aren't readable. Here is what you do. moles phenol = g/molar mass Solve for moles. molality = moles phenol/kg solvent Solve for molality delta T = Kf*m Solve for Kf delta T = Kb*m Solve for Kb.
*Wednesday, February 16, 2011 at 12:16am by DrBob222*

**chemistry --correction**

1) You can use (P1V1/T1) = (P2V2/T2) to solve for volume at STP. 2)Use the same equation from #1 above and solve for volume at STP. For the molar mass, use PV = nRT, solve for n = number of moles of the gas, then use n = grams/molar mass and solve for molar mass.
*Thursday, April 7, 2011 at 12:44pm by DrBob222*

**chemistry**

delta T = 14.5 delta T = Kf*m Solve for m m = mols aspartame/kg solvent Solve for molsl aspartame mola = g aspartame/molar mass aspartame solve for grams.
*Monday, July 16, 2012 at 4:57pm by DrBob222*

**Chemistry**

Use the Clausius-Claypeyron equation and solve for delta Hvap.(You know p at 20 and you know p is 760 mm at 74.1.) Then use CC equation a second time and one of the other values to solve for vapor pressure at 277 K (39F). Use PV = nRT and solve for n. Convert n to grams, ...
*Monday, January 27, 2014 at 9:13pm by DrBob222*

**Algebra**

Solve 3x +1 < 5 or 3x +1 > 4 By saying "solve," is it asking for me to show it on a line and in interval notation? Here's another: f(x) < 3 and f(x) > 4, where f(x) = 1/2x - 7 I have no idea how to solve this! Please walk me through it! Thank you so much!
*Monday, January 26, 2009 at 4:19pm by Harper*

**Physics**

Conservation of momentum leads to .2kg*8.2m/s=.2kg*(-3.9)m/s + Mass*V Solve for V in therms of all the other. Then put that into this for V conservation of energy. 1/2 .2 *8.2^2=1/2 .2*(3.9)^2 + 1/2 MV^2 then solve for mass, after that, go back and solve for V
*Thursday, November 12, 2009 at 3:37pm by bobpursley*

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