Sunday

April 20, 2014

April 20, 2014

Total # Posts: 474

**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.

**word problem 3 thanks**

I forgot to move the decimal one more place.

**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

**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?

**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?

**Math question thanks**

thanks so much

**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?

**Math word problem 2**

You are really good. Thanks. I really appreciate the breakdown of the problem.

**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?

**Math word problem check**

oh okay thanks.

**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/...

**Math question**

I tried the equation and got (-2 }2ã6)/5 Is this the answer?

**Math**

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

**Math word problem**

Is the answer 10 km/h?

**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?

**Math Check**

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

**Algebra help**

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

**Math question**

Thanks I understand now.

**Math question**

Solve: x^2 +4x+1=0 Is the answer 2+-sqrt2?

**Math help**

Thanks

**Math help**

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

**Algebra**

Solve: x^2 +4x+1=0 Is the answer 2+-sqrt2?

**Algebra**

Thanks

**Algebra**

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

**Math check**

Solve: 3x^2-11=0 Is the answer" +- sqrt 11/3?

**Math Algebra check**

Solve: 3x^2-11=0 Is the answer" +- sqrt11/3?

**geography**

sorry i meant titusville PA and i got it but thanks

**geography**

what happened in titusville in 1559

**Georgia Studies**

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

**reading**

What does a magician do when he walks to the edge of a cliff?

**math check**

Simplify: sqrt(x^5 y^2)+sqrt(9xy^2) is the answer sqrtx(x^2y+3y)

**Math check**

multiply: sqrt-25 sqrt-100 is the answer 50?

**word problem**

oh okay, I see what I did wrong sorry. Thank you

**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 ...

**Math check**

if you had to chose would it be the + or - or just select both?

**Math check**

express in terms of i and simplify: srqt-54 is it -3isqrt6?

**math check**

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

**Math word problem**

And how would I do that?

**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?

**Math check**

correct the -2 is on the outside of the square root symbol.

**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

**Math check**

I have the answer as x=4 is that right?

**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

**math check**

Thanks

**math check**

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

**Math**

sqrt (x^5 y^2) +sqrt(9xy^2)

**MAth**

^5 sqrt symbol a^6/ ^4 sqrt symbol a^3

**MAth**

(3+sqrt x)(4- 3 sqrt x)

**Math**

Simplify: 9 sqrt5 -3 sqrt5

**Math**

^4sqrt symbol(x^2 y^3)^3sqrt symbol(xy)

**MAth algebra**

Simplify ^5 sqrt symbol(x^6y^5)/^5 sqrt symbol(x^2 y^2)

**Math**

The problem is solve x= sqrt10x-4-2

**Math**

Solve: x= sqrt(10x-4-2)

**Math**

rationalize the denominator sqrt 5/ (5+sqrt6)

**Math**

I have the answer as 10-4sqrt6 is that right?

**Math**

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

**math**

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

**MAth**

Express using exponential notation sqrt (6xy)^3

**Math**

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

**Math**

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

**Math**

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

**Math**

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

**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?

**Math**

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

**Math check**

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

**Math**

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

**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.

**Math**

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

**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

**math help**

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

**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.

**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.

**Math**

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

**Math**

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

**Math**

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

**Math**

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

**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.

**Math**

Okay I understand thank you both.

**Math**

is it x-4

**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?

**Math**

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

**Math help**

the symbol ã should be the square root symbol

**Math help**

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

**Math**

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

**Math**

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

**Math check 4**

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

**Math check 4**

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

**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,...

**Math**

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

**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)?

**Math check**

Is it 0,63/50

**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

**Math**

Thanks so much

**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?

**Math check**

Thanks

**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?

**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...

**math check question**

Subtract and Simplify: 4a^2/(a-b)-(4b^2-8ab)/(b-a) I have the answer as 4(a+b)^2/(a-b) or should it be 4(a-b)^2/(a-b) Responses Math problem check - bobpursley, Sunday, October 12, 2008 at 4:23pm just the numerator.. 4a^2-8ab + 4b^2, right? 4(a-b)^2 Now does that reduce with t...

**Math problem check**

What about 4a^2/(a-b)-(4b^2-8ab)/(b-a) I thought that you would multiple the second part of the equation by -1 -(4b^2-8ab)/(b-a) to get the common LCD of a-b So I thought the equation would be 4a^2/(a-b) + (4b^2 + 8ab)/(a-b) I have the answer as 4(a+b)^2/(a-b)

**Math problem check**

Okay I have the answer as 4(a-b) is that right

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