Sunday
December 4, 2016

Number of results: 98,180

Ok so I did what you told me reiny but I cant figure out number three which is here 10x - 2 - 6x = 3x - 2 + x Please show how You did it please?
November 19, 2014 by Jeff

To Reiny
Reiny could you please check my Calculus post below, it says Calculus--Reiny.
October 4, 2011 by -Untamed-

Hi Reiny, I posted this problem earlier and you responded but I don't get the reasoning- The problem was -2log8(x+1) = -8 you said multiply by -2 and then you put log8(x+1)=4(wasn't that dividing by -2) log8(x+1)^2 = 8 (how did you get to the power of 2 and =4 became =8 x+1 = ...
December 13, 2010 by Anna

Reiny+ In need of help
Hey Reiny, could you please take a look at my expo growth and decay post? Thanks alot.
March 2, 2009 by Chopsticks

College Algebra
Solve the following equation in the complex number system x^4+x^3+4x^2+10x-60=0 College Algebra - Reiny, Monday, January 2, 2012 at 11:49pm hint x = 2 and x = -3 are roots so either do long division by x-2 and x+3 to get a quadratic or do it by synthetic division. Solve that ...
January 3, 2012 by Jennifer

You helped me with this question and this is what I got but my Professor says that each x and y intercept needs to have a coordinate. Where did I go wrong?? Can you help me? x^2+y^2+4x+2y-20=0 x^2+4x+4+y^2-2y+1=20+4+1 (x+2)^2+(y+1)^2=25--this is where you helped me. Then I ...

Algebra 2 ..
Reiny,why do you have to answers in the promvlem 5x^2...................please look back....
December 27, 2012 by Anonymous

Algebra 2 (Reiny)
How am I supposed to compress f(x) = |2x| - 3 vertically by a factor of 1/4? Please, will you explain this to me?
October 11, 2014 by Victoria

Algebra
Hello Reiny, please check these problems for me and if they are not right WOULD YOU PLEASE HELP ME WITH THE CORRECT ONES THANKS!!! 1. Slove for X, wher X is the real number, square root 5x + 9= square root 9x + 13= 27 2. Find the value: ^3 square root -27= 9 3. Write the ...
October 31, 2010 by lee

reiny
How do I find a variance for a set of numbers {1,16,8,17,12} I got that variance-34.2, but I'm unsure. Any help? Thanks. math - Reiny, Sunday, January 24, 2010 at 8:16pm look at his page. Reiny - April, Sunday, January 24, 2010 at 8:25pm I looked at that page and did my ...
January 24, 2010 by April

October 13, 2016 by Olivia N J

Calculus--Reiny
Calculus - Reiny, Friday, December 23, 2011 at 6:59pm I read that as (4a^2-1)/(4a^2-16) * (2-a)/(2a-1) , my brackets are necessary = (2a+1)(2a-1)/( 4(a+2)(a-2) * (2-a)/(2a-1) the (2-a)/(a-2) are opposite, they will give you the -1 so.. = -(2a+1)/(4(a+2)) , again you have to ...
December 25, 2011 by -Untamed-

Algebra-Can you please check this Reiny
Can you check this: x^-3y^2/x^2y^-4 I think the answer is y^6/x^5 Thanks for explaining the other problem
October 6, 2010 by DeAnne

find the f and g, so that fOg= H H(x)=sqrt x^2+17 please show work
November 27, 2012 by Heather

solve the following equation 9^x-1 = 144(6x) please show work.
November 28, 2012 by confused

.50 - x / x = 3.20e-1 I need to solve for x. I was going to do .50 X 3.20e-1 and then take the square root but this is not correct. I am not sure what to do. Thank you for your help. Math(Please help) - Reiny, Tuesday, April 17, 2012 at 3:18pm You probably meant (.50 - x)/x = ...
April 19, 2012 by Hannah

find the domain of the composite function fog. f(x)= 2/x-3; g(x)= 7/x please show all work.
November 24, 2012 by Heather

Please show equation and solve for the following 1. Lyn's age is 8 years less than 15 times the age of her niece Elizabeth. If the sum of their ages is 24, what is Elizabeth's age ( Let e= Elizabeth's age) 2. Bob is renting a canoe for \$20, plus \$9.75 per day. How mant days ...
September 23, 2009 by DMAR

I am not understanding this question and I have read the chapter many times. Please help. given the function of f(x)=4x-8 a. find the the rate of change between the stated values for x:5 to 7 b. find the equation of a secant line containing the given points (5,f(5)), and (7,f(...

Solve for the value of x: log5(x-2)+log8(x-4)=Log6(x-1)..For your information that 5,8 and 6 are bases not just multipliers. Thank you.
April 10, 2013 by Seth

College Algebra
Write the following a+bi form i(3.14-3i) Please help. I believe that the answer is 3.14i-3i, which would be (3.13*-1)-3*-1. however this was incorrect please tell me where I went wrong
May 28, 2014 by Anonymous

Pre-Calculus - Reiny
Reiny you helped me with this logarithm yesterday: How did you write it out as log2 ( √A / B^3 ) Laws of logarithms combine, write as a single logarithm Need help on this question please, Im stuck, don't know where to go abouts from here: I did it on paint and uploaded ...
October 17, 2012 by Shreya

Calc I (@Reiny)
y = x^3 - 8x^2 + 6x -2 has a slope of 6 at two points, what are the coordinates? I used Reiny's way to help solve this answer. Please check if I've done it correct: y'= 3x^2-16x+6 3x^2-16x+6=6 3x^2-16x=0 x(3x-16)=0 Solve for x's x=0 3x-16=0 ~> x=16/3 Plug x values to ...
October 10, 2016 by Angie

Calc I (@Reiny)
y = x^3 - 8x^2 + 6x -2 has a slope of 6 at two points, what are the coordinates? I used Reiny's way to help solve this answer. Please check if I've done it correct: y'= 3x^2-16x+6 3x^2-16x+6=6 3x^2-16x=0 x(3x-16)=0 Solve for x's x=0 3x-16=0 ~> x=16/3 Plug x values to ...
October 10, 2016 by Angie

algebra 1
Reiny I posted a question earlier (about 3:00) and I have a question about your solution. How did you get -4x? I came up with -8x which does not allow for anymore reduction. Please let me know how you did it. Thanks!
March 9, 2009 by Dippy

use the intermediate value theorem to show that the polynomial function has a zero in the given interval. f(x)=4x^3+3x^2-8x+7;[-5,-2] please show all work

To: Reiny
January 23, 2014 by Raksha

Chemistry
.50 - x / x = 3.20e-1 I need to solve for x. I was going to do .50 X 3.20e-1 and then take the square root but this is not correct. I am not sure what to do. Thank you for your help. Math(Please help) - Reiny, Tuesday, April 17, 2012 at 3:18pm You probably meant (.50 - x)/x...
April 23, 2012 by Hannah

college algebra
please solve by method of substitution 0.3x-0.4y-0.33=0 0.1x + 0.2y -.21=0 please give all steps to solve.I think I understand the basic concept but this is little more complicated for me. Thanks in advance

college algebra
Can someone please help me find the x-intercepts and y-intecepts of this equation. I have the radius, and center but I can't seem to get the intercepts. x^2+y^2=16x-18y+145=25 Please show work. Thanks!!
December 4, 2012 by confused

Reiny or Damon or Bobpursley
Express the series 11 + 18 + 27 +...+ 171 using sigma notation. Usually you would take 27-18 and that's the step between numbers, right? (I think its the k-value?) But 27-18=9 and 18-11=7. Are we stepping by k+2 here? Like k, k+2 k+4, k+6...? Please help me. I'm not confident ...
April 27, 2012 by Tabby

Trig
#1 (1/sinx)(sin^2x + cos^2x(sinx/cosx) )/(sinx + cosx) = (sinx + cosx)/(sinx+cosx) = 1 Reiny helped with this question but I don't how Reiny did it. Please explain
February 21, 2012 by Anonymous

Algebra-Mathmate or Reiny or Dr. Bob, please check
I have two short questions which I think I know the answer-could you please check? If I write log(b)x - 2log(b)y as a single logarithm it would be log(b) x/y^2, correct? If not please help and Is the function f(x) = 1/x a exponential function -I think it would be because it ...
December 14, 2010 by Anna

Reiny
August 24, 2007 by Marissa

To Reiny
July 23, 2011 by Jen

information is given about a polynomial f(x)whose coefficients are real numbers. Find the remaining zeros of f. degree:5, zeros: -6, 6-i please help and show all work.

information is given about a polynomial f(x)whose coefficients are real numbers. Find the remaining zeros of f. degree:5, zeros: -6, 6-i please help and show all work.

information is given about a polynomial f(x)whose coefficients are real numbers. Find the remaining zeros of f. degree:5, zeros: -6, 6-i please help and show all work.

Math College Algebra
February 15, 2016 by ZaJi

how would i do these problems: 6. xsquared + 2x -7 =0 7. 6xsquared - 2x -1 = 0
April 9, 2013 by kathy

The diagram shows tangent circles and lines. if AB=15 CM find AC, AD and AE . Help me reiny and other tutors please<3 thank you this is the figure img19.(imageshack.)us/img19/7143/0eua.png just remove the open and close parentheses thank you
December 4, 2013 by BARBIE LEE

College Algebra
October 21, 2008 by Courtney

college algebra
November 16, 2008 by tina

college algebra
May 24, 2010 by Gregory

Math (Reiny??)
Mrs. Reiny ... As in Harris County Mrs. Reiny?
April 26, 2011 by sa

SAT
please help. I am a foreigner. I need to get into a US college for a bright future. I bought the College Board SAT book. It has no word lists. How do I do well in the SAT? Any tips? Please give me help.
January 19, 2014 by Mohammed

solve the equation in the real number system. 2x^4-23x^3+75x^2-88x+28=0 What are the real solutions of the equations? please show work. I do not know how to work this at all
November 23, 2012 by confused

College Algebra
Can anyone please show me how to solve (5¡Ì7 ¨C 10¡Ì2)(4¡Ì7 + 8¡Ì2)
May 29, 2010 by Amber

college algebra
February 25, 2013 by ray

math help
Thank you for helping me with the last problem Reiny and Bosnian. However, I have one more problem that I need help with please and I have no idea how work the problem. I used an on line calculator to get the answer. It didn't give an explanation on how to do the problem ...
April 23, 2012 by Urgent Urgent Please

Form a polynomial f(x) with real coefficients having the given degree and zeros. degrees 5; zeros 1; -i; 7+i please show all work. I am having a hard time understanding this.
November 20, 2012 by Heather

college algebra--I really need help!!
solve the following exponential equation. exact answers only. 1-9x 2x 2 = e I hope that you understand this question. I don't and need some help please. Can you show all answers please.

College Algebra
20. Growth of an Account If Russ (see Exercise 19) chooses the plan with continuous compounding, how long will it take for his \$60,000 to grow to \$80,000? 3. (1/8) to the 2x-3= 16 to the x +1 13. e to the 4x= 4 to the x-2 15. ln (x-4) ln 3= ln(1/5) to the x power 20. Tripling ...
June 20, 2013 by Phoebe

Math College Algebra (urgent before 2hours)
February 15, 2016 by ZaJi

statistics
At a small college it is known from previous years that 35% of all college freshman start in college algebra. The new freshman class has 100 students in it, What is the probability that between 35 and 42 freshman will start in college algebra? Is it reasonable to approximate ...
March 23, 2012 by lola

College Algebra URGENT
October 29, 2010 by Jess

physics
damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!!
August 8, 2015 by edward

College Algebra
Could you please help me with this problem? We are to graph each compound inequality. x ¡Ý -2y and x - 3y < 6
September 10, 2007 by Shana

College Algebra
Can some please help me and explain this problem to me! Or if you know of any website that will help! Thanks. -2x+4>12
November 15, 2007 by Alicia

college algebra
can someone check my answer for me please! 5x+6y=18 solve for y 6y=18-5 y=3-5/6x
November 16, 2007 by Alicia

college algebra
Please show me how to work this e^.05t =1600
January 31, 2012 by Betty

Reiny
Reiny I think I have found out the rectangle problem. Could you check and see if Ive got it correct?
January 19, 2011 by Sydney

Reiny! Reiny! Reiny!
1. Oanh walked from her home to the grocery store at 3 mi/h and jogged home at 6 mi/h. Her total round trip was 15 minutes (1/4h). How far from Oanh's home is the grocery store? (use an equation to solve this) Help, I am totally clueless on this.
February 5, 2009 by Ellen

algebra
September 2, 2008 by Josh

College Algebra :(
Sketch the graph of y=mx for the given values of m. m=3,-2,2/3,-1/4 please help me, I'm so confused!
September 26, 2011 by Divgar

find the domain of the composite function of fog f(x)=x^2+8;g(x)ãx-5
November 30, 2012 by confused

college algebra
November 25, 2009 by cheryl

College Algebra
December 8, 2010 by Courtney

College Algebra
January 22, 2011 by jen

college algebra
write the expression as a single logarithm In(x/x-2)+In(x+2/x)-In(x^2-4) Please show work

college algebra
Solve the following inequality. x^3+9x^2-108 less or equal to 0. Then write your solution in interval notation. I am sooo confused and do not have any idea how to do this. Can someone please show me step by step please??? Thanks in advance. Someone who is confused.

math
Posted by connie on Monday, July 20, 2009 at 11:56pm. Find the indicated outputs for f(x) = 2x²-4x f(0)= ____? f(-1) =____? f(2) =____? Responses math - Reiny, Tuesday, July 21, 2009 at 8:00am f(0) = 2(0)^2 - 4(0) = 0*0 = 0 f(-1) = 2(-1)^2 - 4(-1) = 2(1) + 4 = 2 + 4 = 6 now ...
July 21, 2009 by connie

reiny
reiny why are you so smart thanks for aswering my question
July 25, 2012 by amira

College Algebra
Solve 2x(squared)-3x-2=0 using the quadratic formula. Can someone explain this to me please?
November 18, 2007 by Alicia

college algebra
solve the equation below. Please show all work. log3(x/2-9)=4
March 4, 2012 by Tammy

solve the following logarithmic equation 2log2(lower than g)^(x-2)+log2^2=3 x=?

college algebra
find functions f anf g so that fog equals H H(x)=ãx^2+17 please show work
November 30, 2012 by confused

College Algebra
3x^4=648x someone help please im so confused. i am trying to find the solution set?

College Algebra
Find all real numbers x satisfying the equation: 2^x + 3^x - 4^x + 6^x - 9^x = 1. Please help me. I really don't know what to do.
January 26, 2015 by Alexandra

Algebra 1 (Reiny)
Will you please explain the steps I must take in order to graph these linear inequalities? Graph each system of linear inequalities. Give two ordered pairs that are solutions and two that are not solutions. 1. y < 2x - 1 y > 2 2. x < 3 y > x -2 3. y => 3x 3x + y...
January 9, 2014 by Victoria

Algebra
December 13, 2011 by Izzy.

College Algebra
Can someone check my answer please? Find the corresponding y values for x= -2,-1,0,1,2,3 if y= x^-x-2. My answers are under Y. X Y -2 -4 -1 -2 0 -2 1 0 2 4 3 10
November 20, 2007 by Alicia

college algebra
The graph of a power function is f(x)=kx^p, where k and p are constants. Do you expect k to be positive or negative ? Explain please.
December 8, 2007 by cedric benson

college Algebra
April 21, 2010 by Tonia

Find a bound on the real zeros of the polynomial f(x)=x^4+4x^3-8x-6 can someone help me, I am confused and don't know where to start.
November 20, 2012 by confused

a circle has the equation x^2+y^2+6x-6y-46=0 find the center and the radius of the euation. If there are any intercepts list them.
December 9, 2012 by Heather

College Algebra
Write the following in a+bi form (-5-i)/(3-3i) -5/3 and 1/3i (-5/2i)/(-1/5i) 23 and 0i (-2i)^3 -2 and 0 Im having trouble with these probems and here is my answers. PLEASE HELP
May 28, 2014 by Anonymous

College Algebra
Let Z be equal to (2-5i) The question is z^2 +iz -(5+i) The answer I got for this was -22 + 18i but it isn't correct on my homework page please help/
May 28, 2014 by Anonymous

Could you check these two problems? 3sqrt (y+2) = 3 is y = 25 Answers were: true or false I said true because I did it like this Square both sides=y + 2 = 3^3 y+2 = 27 y = 25 and sqrt (2y-6) = 3-y for y answes are: no solution 5 3,5 3 I said 3 because I did it like this: 8y -...
October 12, 2010 by Michelle

Math
To Reiny: Hi, thank you for your time Reiny and your info. I am so sorry but on the first one I accidentally put 0 where I should have put =9. In other words, the first equation should have said (9n+1)squared =9. Really sorry to have taken up your time with the wrong equation...
November 3, 2013 by Brandi

College Algebra
I'm still having trouble with this problem. Can someone please explain the steps to me. -2x+4>12 Is this the next step? -2x+4-4=12-4
November 16, 2007 by Alicia

Can someone give me some real life applications that I can use for a quadratic function.
November 20, 2007 by Alicia

College algebra
I need help finding an equation of the line containg (-5,-9)and (-2,-7) the answer has to be in slope-intercept form y=? Can anyone please help me with this?
November 28, 2009 by muff

college algebra
analyze the graph of the following function. r(x)= x^2+x-6 -------- x^2-x-2 there are 8 steps but they don't make sense to me... please show work!! thanks
August 21, 2012 by alli

I don't understand this. The question is use the remainder theorem to evaluate P(x) as given. 1. P(x)=3x^3+11x^2+2x-16 and it gives me P(1/3)
February 25, 2013 by Kristen

.50 - x / x = 3.20e-1 I need to solve for x. I was going to do .50 X 3.20e-1 and then take the square root but this is not correct. I am not sure what to do. Thank you for your help. Math(Please help) - Reiny, Tuesday, April 17, 2012 at 3:18pm You probably meant (.50 - x)/x...
April 18, 2012 by Hannah

COURSE HELP MEEE
Hi i want to be a pediatrician when i grw up so what course should i take in college ? im already in 3rd yr high school... in the philippines , as for me , i surpassed the k12 before they implement it and the next yr we our batch will be the lasy 4th yr hgh school students to ...
February 1, 2014 by Joy

To Reiny, math helper
can you look at my post, its just 4 math terms I need to figure out, please help
September 18, 2013 by Sonia

TO REINY
Hi reiny i just wanna say thank you for always answering my questions thanks for always helping me <3 thank you may god bless you
December 5, 2013 by BARBIE LEE

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