# Questions on Algebra: Polynomials, rational expressions and equations answered by real tutors!

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 Question 217367: The circumference of the world is 25,000 miles and there is a band placed around it. To the band is added 10ft and moved off the earth at an equal distance of x. Which is the largest that can walk under the band. Using C=6.28R. Can a bee 1 inch tall, a snake 1 ft tall, a 3ft child or a 6ft adult walk under the band? Click here to see answer by ankor@dixie-net.com(16523)

 Question 217658: dr. warren purchased some mediacal supplies for \$670. Sales tax rate was 6.5%. How much did Dr. Warren spend on these supplies? Click here to see answer by rfer(13569)

 Question 217898: (3h - 5) (3h + 5) I got 9h * 6y *0 - 25 (don't think this is right) Click here to see answer by rfer(13569)

 Question 217912: For this problem I have to simplify. I have tried it several times and so not understand it. (v-7/v-9)-(v+1/v+9)+(v-45/v^2-81)= Please help me to solve this. I really would appreciate it. Thanks Click here to see answer by checkley77(12569)

 Question 217910: Please help me simplify this problem; 9y^2 + 18y - 12 --------------- 3 Also can you help me complete the factor on these problems; 1. 4x^2y - 8xy 2. 2x^2 - 22x + 60 I really can use the help, I have been stuck on these three problem. Click here to see answer by checkley77(12569)

 Question 217965: Please help me, I do not understand this question: In a motorcycle race, one lap is 650m. Genna starts off 4s after Tom does, but drives 5m/s faster and finishes 2.5s sooner than he does. a) Find the speed of each driver b) Find the time taken by each of them to cover the distance Ans: Tom: 20.0m/s, 32.5s Genna: 25.0m/s, 26s I read somewhere that Genna's time is t-6.5s. Why is that? She finished 2.5s sooner, not 4 + 2.5 THANK YOU SO MUCH!! Click here to see answer by scott8148(6628)

 Question 218065: I need help with: Determine the vertical asymptotes of g(x) = (21 – 7x) / (3x – 9). I dont know if I posted this in the right section, but any direction will help! Click here to see answer by stanbon(60771)

 Question 218145: solve for the indicated variable 1/a + 1/b = c solve for a Click here to see answer by user_dude2008(1861)

 Question 218095: How do you rationalize the denominator or the expression 1/sqrt(3) Click here to see answer by user_dude2008(1861)

 Question 218225: a+b=c for b The instructions are solve for the variable specified. Assume domains inclue only values that give nonzero denominators. I have no idea what that is supposed to mean. Click here to see answer by stanbon(60771)
 Question 218225: a+b=c for b The instructions are solve for the variable specified. Assume domains inclue only values that give nonzero denominators. I have no idea what that is supposed to mean. Click here to see answer by Alan3354(34674)

 Question 218390: I think this is the topic for factoring polynomials and using the zero property.. well im completely lost on the difference and how to do them. Can you help me and give me some problems?? Click here to see answer by jim_thompson5910(29613)

 Question 218429: we are having difficulty setting up equations to solve word problems. al is 3/4 as old as ann. six years ago al was 1/2 as old as ann. how old is each now. age now: ann's age = x al's age = x-.25 age 6years ago: ann - x-6 al - x-.50 Click here to see answer by Alan3354(34674)

 Question 218837: I am supposed to find all numbers for which the rational expression is undefined for this problem: q^3-6q/q^2-64 I don't think there are any numbers that are undefined. Click here to see answer by stanbon(60771)

 Question 218841: I am supposed to solve this-they are fractions. 8-x/9-x= 1/x-9 I am not sure how to do this one. Click here to see answer by stanbon(60771)

 Question 218832: This is a word problem. The speed of train A is 12 mph slower than the speed of train B. Train A travels 200 miles in thesame time it takes train B to travel 260 miles. What is the speed of Train A? What is the speed of Train B? The answer I got was Train A is travelling 50mph, and Train B is travelling 38mph. Click here to see answer by ankor@dixie-net.com(16523)

 Question 219068: what are the roots and asymptotes of f(x)=x^2-4x-5 over x^2+2x+1 Click here to see answer by stanbon(60771)
 Question 219068: what are the roots and asymptotes of f(x)=x^2-4x-5 over x^2+2x+1 Click here to see answer by jsmallt9(3437)