104,312 results

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?

### To Reiny

Reiny could you please check my Calculus post below, it says Calculus--Reiny.

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 = ...

### Reiny+ In need of help

Hey Reiny, could you please take a look at my expo growth and decay post? Thanks alot.

### 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 ...

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....

### 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?

### 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 ...

### 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 ...

### 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 ...

### 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

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

solve the following equation 9^x-1 = 144(6x) please show work.

.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 = ...

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

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(...

### 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

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 ...

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.

### 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.

### Math (Reiny??)

Mrs. Reiny ... As in Harris County Mrs. Reiny?

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

### College Algebra

Can anyone please show me how to solve (5¡Ì7 ¨C 10¡Ì2)(4¡Ì7 + 8¡Ì2)

### college algebra

For the Function F(x)=4x^2-x-1; Find F(-2)=

For the functions F(x)=4x^2+3x+5 and g(x)=3x^2+2x+2, Find: A. (f+g)(3) B.(f+g)(x) C. (f-g)(x) D. (f-g)(-3)

For the functions f(x)=x-4 and g(x)=2x^2-3x-1, Find: A. (f*g)(x) B. (f*g)(-1)

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.

### 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.

### 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 ...

### 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 ...

### 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 ...

### College Algebra

Could you please help me with this problem? We are to graph each compound inequality. x ¡Ý -2y and x - 3y < 6

### 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

### college algebra

can someone check my answer for me please! 5x+6y=18 solve for y 6y=18-5 y=3-5/6x

### college algebra

Please show me how to work this e^.05t =1600

### physics

damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!!

### 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!

find the domain of the composite function of fog f(x)=x^2+8;g(x)ãx-5

### Reiny

Reiny I think I have found out the rectangle problem. Could you check and see if Ive got it correct?

### 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.

### 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 ...

### College Algebra

Solve 2x(squared)-3x-2=0 using the quadratic formula. Can someone explain this to me please?

### college algebra

solve the equation below. Please show all work. log3(x/2-9)=4

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

### 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.

### reiny

reiny why are you so smart thanks for aswering my question

### 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

### 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.

### college Algebra

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.

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.

### 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

### 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/

Use the quotient property to simplify roots. \sqrt{\frac{27a^{13}}{b^{12}}}

### 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...

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 -...

### 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