# Posts by shawn

Total # Posts: 577

**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*

**Math**

if f(x)=x^2 find f(2-sqrt6)

*October 27, 2008*

**math**

if f(x) = sqrt(9-3x) determine the domain of f

*October 27, 2008*

**MAth**

Express using exponential notation sqrt (6xy)^3

*October 27, 2008*

**Math**

Express using radical notation : (6ab)^4/3

*October 27, 2008*

**Math**

Simplify: (4+2i)/2i(4-2i)^-1

*October 27, 2008*

**Math**

Solve: sqrt(7x-5)+sqrt(15x+4)=sqrt(30x+31)

*October 27, 2008*

**Math**

Divide and simplify to the form a+bi. (-8+i)/(2-3i)

*October 27, 2008*

**Math**

Multiply Write the answer in the form a+bi. (2-3i)^2 I am coming up with 4-3i what am I doing wrong?

*October 27, 2008*

**Math**

Multiply: sqrt-25 sqrt-100 is it 50?

*October 27, 2008*

**Math check**

subtract: 3+5i-(-4+6i) is the answer 7-i?

*October 27, 2008*

**Math**

Express in terms of i and simplify: sqrt-54 is the answer -3isqrt6

*October 27, 2008*

**Math 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.

*October 27, 2008*

**Math**

Simplify ^3 sqrt symbol 4x ^3 sqrt symbol 6y Would I combine the 4x and the 6y?

*October 27, 2008*

**math help**

On the paper the 5 is a small five and over the sqrt root symbol and inside the square root is x^7 and y^4

*October 26, 2008*

**math help**

This problem is a little different Simplify: ^5 sqrt symbol(x^7 y^4) How would I solve this problem?

*October 26, 2008*

**Math**

I am kinda stuck on this one Simplify: (x^7 y^4)to the 1/5 power I don't know what to do for this problem. I am lost with what to do with the exponents when you have a number on the outside of the root.

*October 26, 2008*

**Math**

I am kinda stuck on this one Simplify: ^5sqrt(x^7 y^4) I don't know what to do for this problem. I am lost with what to do with the exponents when you have a number on the outside.

*October 26, 2008*

**Math**

^3sqrt4x ^3sqrt6y Not sure of how to work this problem.

*October 26, 2008*

**Math**

yes it is sqrt [ (4x^2)/(36y^6)]

*October 26, 2008*

**Math**

Simplify: sqrt(4x^2)/(36y^6) is the answer x/(3y^3)?

*October 26, 2008*

**Math**

Yes, it is (x^7 y^4)1/5

*October 26, 2008*

**Math**

I am kinda stuck on this one Simplify: ^5sqrt x^7 y^4 I don't know what to do for this problem. I am lost with what to do with the exponents when you have a number on the outside.

*October 26, 2008*

**Math**

Okay I understand thank you both.

*October 26, 2008*

**Math**

is it x-4

*October 26, 2008*

**Math**

Simplify: sqrt x^2-8x+16 I know that this can be factored out to sqrt (x-4)(x-4) what do i do next?

*October 26, 2008*

**Math**

Simplify: square root of 25a^2 I have the answer as 5a is that right?

*October 26, 2008*

**Math help**

the symbol ã should be the square root symbol

*October 26, 2008*

**Math help**

Simplify: ^3ã-216/(x^9) I have the answer as -6/(x^3) Is that right?

*October 26, 2008*

**Math**

square root 63 I have the answer as 3square root 7

*October 26, 2008*

**Math**

Simplify: ã63 I have the answer as 3ã7 is that right?

*October 26, 2008*

**Math check 4**

I tried it again I think it is 0,6/5 is that right?

*October 12, 2008*

**Math check 4**

Okay I tried it again. I came up with 0,12/5 is that right?

*October 12, 2008*

**Math check 4**

Find the y-intercepts for the function given by: f(x)= 4/(x+5)-1/(x-4)/2/(x-3)+3/(x+2) Math check - Damon, Sunday, October 12, 2008 at 5:56pm The y axis intercepts are the values of the function when x = 0 4/5 - [(1/-4)] / [(2/-3)] + 3/2 Math check - shawn, Sunday, October 12...

*October 12, 2008*

**Math**

Solve: 3/(9x-6)=5/(7x+1) I have the answer of 11/8 it is probably wrong.

*October 12, 2008*

**Math check 3**

Simplify: 9/(y+8)-y/(y-2)+(y^2+4)/(y^2+6y-16) IS the answer y-14/(y-2)(y+8)?

*October 12, 2008*

**Math check**

Is it 0,63/50

*October 12, 2008*

**Math check**

Find the y-intercepts for the function given by: f(x)= 4/(x+5)-1/(x-4)/2/(x-3)+3/(x+2) I am stuck

*October 12, 2008*

**Math**

Thanks so much

*October 12, 2008*

**Math**

Simplify: (X^2+X-2)/(X^2-9)/(X^2-6X-16)/(X^2-6X+9) I have the answer as (X-3)(X-1)/(X-8)(X+3) is this right?

*October 12, 2008*

**Math check**

Thanks

*October 12, 2008*

**Math check**

subtract and simplify: 4a^2/(a-b)- (4b^2-8ab)/(b-a) I have the answe as 4(a-b) is this correct?

*October 12, 2008*

**Math check 3**

f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I have multiplied the LCD of (a-8)(a+7)(a+22)by both sides with no luck. This is a multiple choice question a.) -161/8 b.) 120/7 c.) 161/7...

*October 12, 2008*