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

Tutors Answer Your Questions about Polynomials-and-rational-expressions (FREE)

Question 233699: 2x + 5y =19
4x - 3y =-1

Click here to see answer by mestrydilip(12)

Question 233781: Factor each polynomial completly.
m^4-81
Click here to see answer by stanbon(57977)

Question 233784: Solve each equation.
x(2x-3)(4x-1)=0

Click here to see answer by ly12603(44)

Question 233845: Factor.
(m + 4)(a – 5) + (m + 4)(a + 3)

Click here to see answer by Edwin McCravy(8999)

Question 233927: 8x^3-16x^2+12x/-2x
Click here to see answer by checkley77(12569)

Question 233476: Travis paddles his kayak in the harbor at Morro Bay, California, where the incoming tide has caused a current in the water. From the point where he enters the water, he paddles 2 miles against the current, then turns around and paddles 2 miles back to where he started. His average speed when paddling with the current is 3 miles per hour faster than his speed against the current If the complete trip (out and back) takes him 1.4 hours, find his average speed when he paddles against the current.

MPH_____________
Click here to see answer by ankor@dixie-net.com(15746)

Question 233951: I am having a hard time solving the following problem:
Simplify.
5x^-2 - 3y^-1/x^-1+y^-1
So far I have:
x+y/5x^2-3y
But I can't figure out if I can simplify it anymore.
Click here to see answer by Alan3354(31532)

Question 233940: Factor. x^2 – 3xy - 18y^2

Click here to see answer by scott8148(6628)

Question 233999: Factor the Algebraic expression completely x^8-1
Thanks so much

Click here to see answer by scott8148(6628)

Question 233998: x^4 + 2x^3 - 3x - 6 factor the algebraic expressions completely. Thank you :)
Click here to see answer by scott8148(6628)

Question 233996: 6t^2-5t+1 please factor it
Click here to see answer by scott8148(6628)

Question 233992: (2x^5)^3(-3x^4)^3 simplify please thank you!
Click here to see answer by dawny74(8)

Question 234079: what is 3x - 7 = 26?
Click here to see answer by rfer(12730)

Question 233994: 7(x^4)^5(-4x^2)^2 simplify please thank you!
Click here to see answer by Alan3354(31532)

Question 234084: Factor completely
6x^3 - 4x^2 - 10x
Click here to see answer by mando271(42)

Question 234082: what does it mean to refer to a 20-in TV set or a 25-in TV set? Such units refer to the diagonal of the screen. A 15-in TV set also has a width of 12 inches. What is its height? What is the height of a 15-in TV?
Click here to see answer by eggsarecool(46)

Question 234148: Consider the following.
(5x3 + 6x + 256) (x + 4)
Use synthetic division to divide
Click here to see answer by nyc_function(2733)

Question 234218: i need help showing work on this problem i dont get how to do 2x+x+12>78
Click here to see answer by Alan3354(31532)

Question 234334: I am supposed to factor the trimonial:
b^2+8b + 16
Is the answer 2 because b^2 + 8b factor out completely, leaving 2 since 8x2=16?
Click here to see answer by checkley77(12569)

Question 234325: i need help with this problem; (6t3-3t2+t-[(t3+3t2-3)-(3-t)] ihave no idea what to do first or how to solve this
Click here to see answer by checkley77(12569)

Question 234394: 4x/x-5 + 2/x = -4/x-5
I understand that the LCD is x(x-5) but then I get stuck
Click here to see answer by user_dude2008(1861)

Question 234394: 4x/x-5 + 2/x = -4/x-5
I understand that the LCD is x(x-5) but then I get stuck
Click here to see answer by josmiceli(9817)

Question 234376: [40/(x-2)] - 1 = [42/(x+2)]
Solve for x:
TRIED: and got -x^2 - 2x + 168 = 0 ; but this is unfactorable... unsolveable?
Click here to see answer by user_dude2008(1861)

Question 234376: [40/(x-2)] - 1 = [42/(x+2)]
Solve for x:
TRIED: and got -x^2 - 2x + 168 = 0 ; but this is unfactorable... unsolveable?
Click here to see answer by checkley77(12569)

Question 234420: I wasnt sure how to type it out but it is 3 over x plus 5 over why ALL over 5x+3y
Click here to see answer by edjones(7569)

Question 234104: I'm still having a ridiculous time with this problem. I don't know why I can't get this, even after reviewing my factoring notes.
3a-3y/3a-3y-ab+by * b^2-9/6b+18
3(a-y)/3(a-y)+b^2(y-a) * (b+3)(b-3)/6(b+3)
b(y-a) * 1/2
1/2b (y-a)
I know the answer is -1/2, but I'm not sure why. This one's just really super tough for me for some reason! Thank you!
Click here to see answer by ankor@dixie-net.com(15746)

Question 234514: How do you factor 3m^2-3n^2
I don't no how to start the problem
Click here to see answer by nyc_function(2733)

Question 234515: I need to factor t^3-8. I have (t-2)(t^2+ + )
I can't figure out the rest can you help me please?
Click here to see answer by nyc_function(2733)

Question 234167: I am supposed to find all numbers for which the rational expression is undefined:
m^3 - 8m/ m^2 - 36
Click here to see answer by ankor@dixie-net.com(15746)

Question 234456: The polynomial 0.041h - 0.018A - 2.69 can be used to estimate the lung capacity, in liters, of a female with height h cm and age A years. Find the lung capacity of a 22-year-old woman who is 188 cm tall. Round to the nearest liter.
Click here to see answer by checkley77(12569)

Question 234566: on an architects bluprint, 1 inch corresponds to 4 feet find the length of a wall represented by a line that is 3 and 7/8 inches long on the bluprint
Click here to see answer by nyc_function(2733)

Question 234568: twelve divided by the sum of x and 2 equals the quotient of 4 and the difference of x and 2 find x
Click here to see answer by stanbon(57977)

Question 234570: An experienced bricklayer constructs a small wall in 3 hours. the apprentice completes the job in 6 hours. find how long it takes if they work together.
Click here to see answer by nyc_function(2733)

Question 234574: A boat can travel 9 miles upstream in the same amount of time it takes to travel 11 miles downstream. if the current of the river is 3 miles per hour, complete the chart below and use it to find the speed of the boat in still water
distance = rate * Time
upstream 9 r-3
downstream 11 r+3
Click here to see answer by solver91311(17077)

Question 234575: i need help with two problems?
1/X^2+3x-10 + 1/x-6 all over 1/x-5 - 1/X^2-8x+12 that is my first one

the second one is 5/x + 3/2x all over 1/3x + 1/4x

Click here to see answer by stanbon(57977)

Question 234578: Thank you in advance for your help. I know that you need to factor out 1, -1 because it will go into all three numbers.
Factor completely
10z^2 + 29z + 10
Click here to see answer by mando271(42)

Question 234702: x(x+3)
Click here to see answer by stanbon(57977)

Question 234654: I'm having trouble with simplifying (-4x^4)^3(x^2)
Thank you,
Kerri
Click here to see answer by user_dude2008(1861)

Question 234811: How would you factor: 18W^4Z^2+24WX^2Z-60WX^3Z^8?
Click here to see answer by checkley77(12569)

Question 234923: Hello.

I am having trouble solving the following polynomial inequality.

This is as far as I can go, because I can not factor it.

Thank you in advance.

Click here to see answer by chibisan(131)

Question 234939: Given 1/(1-x)=1+x+x^2+x^3+x^4+......,
calculate:1/(1-x)^2
Click here to see answer by Edwin McCravy(8999)

Question 235084: Find the area, A(x), of a triangle with height 6x (inches) and base 9x-1 (inches). Find A(50).
Click here to see answer by solver91311(17077)

Question 235040: a^2-5a+6/a-3 divided by (a-2)
Click here to see answer by JenniferTutors(83)

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