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

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Question 40582: Joe and Mary working together can rake a lawn in 2 hours. Joe can do the job alone in 3 hours. How long would it take Mary to rake the lawn alone?
Click here to see answer by stanbon(26259)

Question 40579: (-7)(-5)/(12-7)
Click here to see answer by abcdefg(37)

Question 40607: it takes 4 hours for 9 cooks to prepare a school lunch. How long would it take 6 cooks to prepare the lunch?
it would take 6 cooks _____hours.
is it 2.66?
Click here to see answer by AnlytcPhil(958)

Question 40609: if y varies inversly as x and y=24 when x=8 find y when x=4
y=_____
Thank you can sum one teach me this??????please???????????
Click here to see answer by Nate(3495)

Question 40608: the time(t) required to empty a tank varies inverse as the rate(r) of pumping. A pump can empty a tank at the rate of 1200 L/min how will it take the pump to empty the tank at 3000L?
it will take____minutes to empty the tank.
Click here to see answer by Nate(3495)

Question 40606: if y varies inversly as x and y=5 when x=3 find x when y=15
x=_____
is it 9?
Click here to see answer by Nate(3495)

Question 40598: if y varies inversly as x and y=2 when x=1 find x when y=4
x=_____
Thank you
Click here to see answer by Nate(3495)

Question 40596: if y varies inversly as x and y=5 when x=2 find x when y=4
x=_____
Thank you
Click here to see answer by Nate(3495)

Question 40594: round 20.615 to the nearest tenth
Thank You please HELP!!!!!!!!!
Click here to see answer by Nate(3495)

Question 40368: Simplify and write with positive exponents only
(x^2)^-3(x^-2) divided by (x^2)-4
Click here to see answer by junior403(76)

Question 40684: Complete the equation of variation where y varies inversly as x and y=8 when x=10.
y= ___/x
isnt it 80??
Thank you.
Click here to see answer by Nate(3495)

Question 40682: if y varies inversly as the square of x and y=4 when x=5 find y when x=2
y=_____
doesnt y=50?
Click here to see answer by Nate(3495)

Question 40685: The Nutty Shoppe has 10 kg of mixed pecans and cashews, which sell for $ 8 per kilogram. Cashews alone sell for $8 per kilogram, and pecans sell for $9 per kilogram. How many kilograms of pecans are there in the mix?
How many kilograms of cashews are there in the mix?
Thanks

Click here to see answer by checkley71(8405)

Question 40674: factor each ploynomial using the distributive property.
5x^2 - 15x

34x^4y^3 - 17x^2y^5

2x^2y^2 - 8x^6y^6
please show work if you can, I am trying to learn this stuff! Thanks!
Click here to see answer by Nate(3495)

Question 40670: Simplify.
x^4 * x^-6
Click here to see answer by Nate(3495)

Question 40663This question is from textbook
: The speed of sound is 1088 feet per second. Convert the speed of sound to miles per hour. Round your answer to the nearest whole number.This question is from textbook

Click here to see answer by Nate(3495)

Question 40662This question is from textbook
: A jogger covers 3.5 miles in 28 minutes. Find the average speed of the jogger in miles per hour.This question is from textbook

Click here to see answer by Nate(3495)

Question 40661This question is from textbook
: A car makes a 120 mile trip 10 miles per hours faster than a truck. The truck takes 2 hours longer to make the trip. What are the speeds of the car and the truck?This question is from textbook

Click here to see answer by checkley71(8405)

Question 40706: Solve.
2y^2 – y – 3 = 0
Thanks!
Click here to see answer by stanbon(26259)

Question 40711: Please evaluate.

Thanks!
Click here to see answer by ntnk(49)

Question 40710: Please evaluate.
4^0
Thanks!
Click here to see answer by checkley71(8405)

Question 40710: Please evaluate.
4^0
Thanks!
Click here to see answer by longjonsilver(2297)

Question 40709: Please write in standard notation.
2.5 * 10^5
Thanks!
Click here to see answer by checkley71(8405)

Question 40709: Please write in standard notation.
2.5 * 10^5
Thanks!
Click here to see answer by longjonsilver(2297)

Question 40723: A tank can be filled in 18 hours by Pipe A or 24 hours by Pipe B. How long would it take both pipes to fill the tank?
_____hours
--------------------------------------------------------------------------------
It takes Sarah 8 hours to fill a Widget. Jerry can do the same job in 12 hours. How long would it take them to assemble a Widget if they worked together?
_______hours.
Thanks
Click here to see answer by checkley71(8405)

Question 40725: Christy spent $500 over her budget on gifts during the holidays. In addition to her regular job, she took a part time job at the Pharmacy that paid $10 per hour. Her schedule would allow her to work 12 extra hour a week at the pharmacy. How many whole weeks will it take Christy to have enough money to pay off the debt?
Thank you
Click here to see answer by checkley71(8405)

Question 40731: 30/10+Y= 20/10-Y
Click here to see answer by tutorcecilia(2042)

Question 40722: The area of a rectangle of length x is given by 3x^2 + 5x. Find the width of the rectangle.
Click here to see answer by tutorcecilia(2042)

Question 40742: What is the answer to 6x^2+7x-20=0
Click here to see answer by Nate(3495)

Question 40750: factory the following polynomial completely
14x ^2 - 20x + 6
Click here to see answer by Nate(3495)

Question 40755This question is from textbook

: (x^2-x-4)^(3/4)-2=6This question is from textbook

Click here to see answer by Nate(3495)

Question 40757: INTERSECTIONS AND UNIONS
let A={1,2,3,4,5}
B={6}
C={7,8}
Find Intersection A & C
i dont understand because there's nothing the same between A and C.

Click here to see answer by rajagopalan(125)

Question 40726: Kareem purchased a leather jacket for $800 with his new credit card. He budgeted $50 a month to pay toward the debt. When he read the fine print on the credit card statement, he saw that for each month he owed a balance, a finance charge of $17.50 would be added. How many months will it take Kareem to pay off the leather jacket?
Thanks

Click here to see answer by rajagopalan(125)

Question 40413: 8. If f(x)= (ax-b)/c and f(f(x))=x for all x, then which of the following must be true?
I. |a| = |c|
II. a = 0
III. b>0
Answer. I and II only
The book has the solution but I can't seem to understand. Perhaps u can explain it in another way? thank u
Click here to see answer by venugopalramana(3286)

Question 40761: factor this trinomial
16x^2 + 40xy + 25y^2
Click here to see answer by gsmani_iyer(161)

Question 40764: Rewrite the middle term as the sum of two terms and then factor completely
12w^2 + 19w + 4

Click here to see answer by gsmani_iyer(161)

Question 40765: Rewrite the middle term as the sum of two terms and then factor completely
4z^3 - 18z^2 - 10z
Click here to see answer by stanbon(26259)

Question 40727: can someone TEACH me how to find a boundry of a line??????(step by step)
for example--- Y>/ x+3
y>/ -x+1
Click here to see answer by stanbon(26259)

Question 40763: Factor this trinomial completly
2a^3 - 52a^2b + 96ab^2

Click here to see answer by mbarugel(146)

Question 40793This question is from textbook Beginning Algebra
: A number added to the product of 6 and the reciprocal of the number equals -5.This question is from textbook Beginning Algebra

Click here to see answer by venugopalramana(3286)

Question 40795This question is from textbook Beginning Algebra
: A semi-truck travels 300 miles through the flatland in the same amount of time that it travels 180 miles through mountains. The rate of the truck is 20 miles per hour slower in the mountains than in the flatland. Find both the flatland rate and the mountain rate.This question is from textbook Beginning Algebra

Click here to see answer by josmiceli(3003)

Question 40797This question is from textbook Beginning Algebra
: A boat can travel 9 miles upstream in the same amount of time it takes to tarvel 11 miles downstream. If the current of the river is 3miles 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+3This question is from textbook Beginning Algebra

Click here to see answer by stanbon(26259)

Question 40792: (3x-2)(x-4)-(x-4)(6-5x)/(4-x)(8x-1)
I think the answer might be : (-3x+2)(-6+5x)/(8x-1)
Click here to see answer by Nate(3495)

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