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July 5, 2015

Posts by shawn


Total # Posts: 512

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 }2ã6)/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

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