Friday

September 4, 2015
Total # Posts: 519

**Algebra help**

Thanks
*December 1, 2008*

**Algebra help**

Find the formula for the inverse of each function. 4.) g(x)= (x+5)^3 I do not understand how to do this one.
*December 1, 2008*

**Algebra check**

Thanks
*December 1, 2008*

**Algebra check**

Convert to exponential equations. 12.) m=log3 9 I have the answer as 3^m =9 13.) log2 64=6 I have the answer as 2^6 =64 Are these answers right?
*December 1, 2008*

**Algebra check Reiny**

So then are these answers right? 10.) 4^-3 =1/64 I have the answer as log4 1/64 =-3 11.) 144^1/2 =12 I have the answer as log 144^12 =1/2
*November 30, 2008*

**Algebra check DrBob222**

I have a question the formula that I used was b^y=x means that logbx=y is this the correct formula? so using that formula I got the following. 4^-3 =1/64 I have the answer as log4 1/64 =-3 144^1/2 =12 I have the answer as log 144^12 =1/2
*November 30, 2008*

**Algebra check**

Thanks.
*November 30, 2008*

**Algebra check**

Convert to Logarithmic equations. 10. 4^-3 =1/64 I have the answer as log4 1/64 =-3 11. 144^1/2 =12 I have the answer as log 144^12 =1/2 Are these answers right?
*November 30, 2008*

**Algebra inverse question**

Hi Reiny, I just have one question for 4.) the problem is g(x)= (x+5)^3 how were you able to convert the equation to the following? let y = (x+5)^2 interchange x with y x = (y+5)^2
*November 30, 2008*

**Algebra inverse**

Find the formula for the inverse of each funtion. 3.) f(x)= 2x-5 for this one I have y= (x+5)/2 is this correct? 4.) g(x)= (x+5)^3 I am stuck on this one.
*November 30, 2008*

**Thanks**

Thanks
*November 30, 2008*

**Algebra check Damon**

Not a function but is it one to one?
*November 30, 2008*

**Algebra check**

Determine whether f(x)=x^2 is one to one. I have the answer as yes. Is this right
*November 30, 2008*

**Algebra check**

Determine whether f(x)=x^2 is one to one. When I substitute values in for x even when I use negative values x^2 will be positive so is it one to one?
*November 30, 2008*

**Algebra help drwls**

for f of g(x) I have -4x^2-10x-6 Is this right?
*November 30, 2008*

**Algebra help**

Find (fog)(x)and (gof)(x)if f(x)=x-x^2 and g(x)= 2x+3. Okay so I did the following: For f(of)g(x), take (2x+3) - (2x+3)^2 (insert g(x) where the "x" is in f(x) ) For g(of)f(x), take 2[x-x^2] +3 The first answer that I get for (2x+3) - (2x+3)^2 is -4x^2-12x-9 The ...
*November 30, 2008*

**Algebra help**

Find (fog)(x)and (gof)(x)if f(x)=x-x^2 and g(x)= 2x+3.
*November 28, 2008*

**Algebra word problem help**

Thank you. I was able to get the same answers.
*November 21, 2008*

**Algebra word problem help**

The average walking speed R of people living in a city of population P,in thousands, is given by R=0.37InP+0.05, where R is in feet per second. a.) The population of Honolulu, Hawaii is 395,790. Find the average walking speed. b.) A city's average walking speed is 2.70 ft/...
*November 21, 2008*

**6th geography kinda in a hurry**

whoops i meant NYG to arizona not TN
*November 20, 2008*

**6th geography kinda in a hurry**

Number the rivers in the sequence the NY giants will cross them en route to the valley of the sun(Tennessee) Arkansas Delaware Hudson Illinois mississippi Missouri Ohio Rio Grande
*November 20, 2008*

**6th geography**

Yeah i have 2 more that i cant find: can you answer (or atleast help with) these questions- Number the rivers in the sequence the NY giants will cross them en route to the valley of the sun(Tennessee) And (the other question is much more important)what 5 states cover the area ...
*November 20, 2008*

** 6th geography**

your a life saver
*November 20, 2008*

** 6th geography**

what is the shallow part of the sea off the coast of Boston called?
*November 20, 2008*

**Math Algebra check Thanks**

Thanks
*November 10, 2008*

**Math Algebra check please**

Solve w= (va)/(r^2+a^2) for a. I applied the quadratic formula a= (v/w +- sqrt (v^2/w^2 - 4*(-wr^2)) /2 and I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w is this right?
*November 10, 2008*

**Math help**

Did I find this out correctly?
*November 10, 2008*

**Math help**

Solve: x-(3/x)<0 is the answer(-infinity, -sqrt3)U(0,sqrt3) ?
*November 10, 2008*

**MAth answer check**

One solution of kx^2 +6x-k=0 is -3. Find the other solution I have the answer as -1/3 is this right?
*November 10, 2008*

**Algebra problem**

Which of the following points is an x-intercept of the graph of f(x)=(x^2+2x)^2 -11(x^2+2x)+24? a.)(4,0) b.)(-6,0) c.)(6,0) d.)(-4,0)
*November 10, 2008*

**Math check please**

Solve w= (va)/(r^2+a^2) for a. I applied the quadratic formula a= (v/w +- sqrt (v^2/w^2 - 4*(-wr^2)) /2 and I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w
*November 10, 2008*

**Math Help please answer**

I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w
*November 9, 2008*

**Math Help please**

Solve w= (va)/(r^2+a^2) for a. is the answer a= sqrt[w(r^2+v^2)/v]?
*November 9, 2008*

**Math Algebra help**

Solve w= (va)/(r^2+a^2) for a. is the answer a= sqrt[w(r^2+v^2)/v]?
*November 9, 2008*

**Math Algebra check**

Which of the following quadratic equations has -4 and 3/4 as the solutions? a.)x^2+(13/4x)-3 b.)x^2+(30/7x)-(25/7) c.)x^2+(30/7x)+(25/7) d.)x^2-(13/4x)+3 I substituted the values and I have the answer as (a.)
*November 9, 2008*

**Math help**

Which of the following quadratic equations has -4 and 3/4 as the solutions? a.)x^2+(13/4x)-3 b.)x^2+(30/7x)-(25/7) c.)x^2+(30/7x)+(25/7) d.)x^2-(13/4x)+3 I substituted the values and I have the answer as (a.)
*November 9, 2008*

**Math help update Thanks**

Thanks
*November 9, 2008*

**Math help update**

let f(x) = 12x^2 +7x-10. Find x such that f(x)=0 a.) -4/5, 5/3 b.) -5/4, 2/3 c.) -2/5, 5/3 d.) -5/3, 2/3 I think I have it. I was able to factor out 12x^2 +7x-10 to (4x+5) (3x-2)=0 The answer is -5/4 and 2/3 right?
*November 9, 2008*

**Math answer check**

Determine the type of number that the solutions of x^2 +5x+3=0 will be I have the answer as rational is that right?
*November 9, 2008*

**Math help 2 answers**

I think I have it I was able to factor out 12x^2 +7x-10 to (4x+5) (3x-2)=0 answer is -5/4 and 2/3 right?
*November 9, 2008*

**Math help 2**

let f(x) = 12x^2 +7x-10. Find x such that f(x)=0 a.) -4/5, 5/3 b.) -5/4, 2/3 c.) -2/5, 5/3 d.) -5/3, 2/3
*November 9, 2008*

**Math help 2 update**

Thanks just to make sure I have the problem as x^2+8x less than or equal to 9.
*November 9, 2008*

**Math help 2**

Solve: x^2 +8x </=9. How would I solve this?
*November 9, 2008*

**Math help Thanks**

Thank you so much
*November 9, 2008*

**Math help**

Solve: x^2 +5x=1. Use a calculator to approxiamte the solutions with rational numbers. is the answer -0.1925824, 5.65331193 ?
*November 9, 2008*

**Math check**

Complete the square: x^2 -12x. Which of the following is the correct perfect-square trinomial? the answers are: a.) x^2 +22x+121 b.) x^2 -10x+25 c.) x^2 -20x+44 d.) x^2 -12x+36 This is tough because the answers could be a.) b.) and d.) I am not sure which to choose.
*November 9, 2008*

**word problem 3 thanks**

I forgot to move the decimal one more place.
*November 9, 2008*

**word problem 3**

Rosie's Palm Pirates, a manufacturer of electronic organizers, estimates that when x hundred Palm Pirates are made, the average cost per unit is given by C(x) = 0.4x^2 -3.68x+9.524, where C is in hundreds of dollars. What is the minimum cost per unit? is the answer $ 10.60
*November 9, 2008*

**Math help**

What is the y-intercept of f(x)=x^2+x-12? the answers are a.)(0,12) b.)(-72,0) c.)(0,-12) d.)(0,-72) I have the answer as (c.)(0,-12) is this right?
*November 9, 2008*

**Algebra y-intercept**

What is the y-intercept of f(x)=x^2+x-12? the answers are a.)(0,12) b.)(-72,0) c.)(0,-12) d.)(0,-72) I have the answer as (c.)(0,-12) is this right?
*November 9, 2008*

**Math question thanks**

thanks so much
*November 9, 2008*

**Math question**

Solve: x^-2 - x^-1= 5/4 I multiplied all terms of your equation by 4x^2 to get 5x^2 + 4x - 4 = 0 I get (-2+/-2sqrt6)/5 is this correct?
*November 9, 2008*

**Math word problem 2**

You are really good. Thanks. I really appreciate the breakdown of the problem.
*November 9, 2008*

**Math word problem 2**

Sabine and Hercule can assemble a table in 45 minutes. Working alone, it takes Hercule 48 minutes longer than Sabine to put this table together. How long would it take for Sabine to assemble the table by herself? What formula would I use to solve this?
*November 9, 2008*

**Math word problem check**

oh okay thanks.
*November 9, 2008*

**Math word problem check**

The Mad River flows at a rate of 3 km/h. In order for a boat to travel 78.2 km upriver and then return in a total of 8 hr, how fast must the boat travel in still water? what formula would be used to solve this problem? I used the formula of V = D/T T = D/V, you know that 78.2...
*November 9, 2008*

**Math question**

I tried the equation and got (-2 }2ã6)/5 Is this the answer?
*November 9, 2008*

**Math**

Solve: x^-2 - x^-1= 5/4 I have the answer as (5+/- sqrt29)/2 Is this right?
*November 9, 2008*

**Math word problem**

Is the answer 10 km/h?
*November 9, 2008*

**Math word problem**

The Mad River flows at a rate of 3 km/h. In order for a boat to travel 78.2 km upriver and then return in a total of 8 hr, how fast must the boat travel in still water? what formula would be used to solve this problem?
*November 9, 2008*

**Math Check**

Solve: x^-2 - x^-1= 5/4 I have the answer as (5+/- sqrt29)/2 Is this right?
*November 9, 2008*

**Algebra help**

Solve: x^-2 - x^-1= 5/4 I have the answer as (5+/- sqrt29)/2 Is this right?
*November 9, 2008*

**Math question**

Thanks I understand now.
*November 9, 2008*

**Math question**

Solve: x^2 +4x+1=0 Is the answer 2+-sqrt2?
*November 9, 2008*

**Math help**

Thanks
*November 9, 2008*

**Math help**

Solve: x+5=x^2 I have (1+- sqrt 21)/2 Is that right or did I calculate something wrong?
*November 9, 2008*

**Algebra**

Solve: x^2 +4x+1=0 Is the answer 2+-sqrt2?
*November 9, 2008*

**Algebra**

Thanks
*November 8, 2008*

**Algebra**

Solve: 5x(x-5)-2x(x+4)=-90 Is the answer 5,6 ?
*November 8, 2008*

**Math check**

Solve: 3x^2-11=0 Is the answer" +- sqrt 11/3?
*November 8, 2008*

**Math Algebra check**

Solve: 3x^2-11=0 Is the answer" +- sqrt11/3?
*November 8, 2008*

**geography**

sorry i meant titusville PA and i got it but thanks
*October 30, 2008*

**geography**

what happened in titusville in 1559
*October 30, 2008*

**Georgia Studies**

the union was not for slavery and they had more factories, a bigger population, and just a better trained army
*October 30, 2008*

**reading**

What does a magician do when he walks to the edge of a cliff?
*October 28, 2008*

**math check**

Simplify: sqrt(x^5 y^2)+sqrt(9xy^2) is the answer sqrtx(x^2y+3y)
*October 27, 2008*

**Math check**

multiply: sqrt-25 sqrt-100 is the answer 50?
*October 27, 2008*

**word problem**

oh okay, I see what I did wrong sorry. Thank you
*October 27, 2008*

**word problem**

A disoriented driver crosses diagonally from one corner of a 150 m by 275 m lawn to the far corner. How far does the wayward driver drive across the lawn? Give an approximate answer to three decimal places. What formula would I apply to solve this? Responses Math word problem...
*October 27, 2008*

**Math check**

if you had to chose would it be the + or - or just select both?
*October 27, 2008*

**Math check**

express in terms of i and simplify: srqt-54 is it -3isqrt6?
*October 27, 2008*

**math check**

subtract: 3+5i-(-4+6i) is the answer 7-i?
*October 27, 2008*

**Math word problem**

And how would I do that?
*October 27, 2008*

**Math word problem**

A disoriented driver crosses diagonally from one corner of a 150 m by 275 m lawn to the far corner. How far does the wayward driver drive across the lawn? Give an approximate answer to three decimal places. What formula would I apply to solve this?
*October 27, 2008*

**Math check**

correct the -2 is on the outside of the square root symbol.
*October 27, 2008*

**Math check**

The problem is solve x= sqrt10x-4-2 So it would be x=sqrt10x-6 right I have as x=4 is that right? or is it 2,4
*October 27, 2008*

**Math check**

I have the answer as x=4 is that right?
*October 27, 2008*

**Math check**

The problem is solve x= sqrt10x-4-2 So it would be x=sqrt10x-6 right then how would I solve for x
*October 27, 2008*

**math check**

Thanks
*October 27, 2008*

**math check**

if f(x)=x^2 find f(2-sqrt6) I have the answer as 10-4sqrt6 is that right?
*October 27, 2008*

**Math**

sqrt (x^5 y^2) +sqrt(9xy^2)
*October 27, 2008*

**MAth**

^5 sqrt symbol a^6/ ^4 sqrt symbol a^3
*October 27, 2008*

**MAth**

(3+sqrt x)(4- 3 sqrt x)
*October 27, 2008*

**Math**

Simplify: 9 sqrt5 -3 sqrt5
*October 27, 2008*

**Math**

^4sqrt symbol(x^2 y^3)^3sqrt symbol(xy)
*October 27, 2008*

**MAth algebra**

Simplify ^5 sqrt symbol(x^6y^5)/^5 sqrt symbol(x^2 y^2)
*October 27, 2008*

**Math**

The problem is solve x= sqrt10x-4-2
*October 27, 2008*

**Math**

Solve: x= sqrt(10x-4-2)
*October 27, 2008*

**Math**

rationalize the denominator sqrt 5/ (5+sqrt6)
*October 27, 2008*

**Math**

I have the answer as 10-4sqrt6 is that right?
*October 27, 2008*