Questions on Algebra: Proportions answered by real tutors!

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Question 481709: (x+y)/(3a-b)=(y+z)/(3b-c)=(z+x)/(3c-a)
prove that
(x+y+z)/(a+b+c)=(ax+by+cz)/(a^2+b^2+c^2)
Click here to see answer by mananth(16946)

Question 482133: how to get the proportion 40 feet is to 140 as 6 feet is to 21
Click here to see answer by mathstutor494(120)

Question 482165: Austin runs 6 miles in 45 minutes. At the same rate, how many miles would he run in 18 minutes?

Click here to see answer by edjones(8007)

Question 482472: Two persons are to run a race, but one can run 10 meters per second, whereas the other can run 6 meters per second. If the slower runner has a 70-meter head start, how long will it be before the faster runner catches the slower runner, if they begin at the same time?

Click here to see answer by mananth(16946)

Question 482471: (2x-1) (x^2+3x-3)=

Click here to see answer by rfer(16322)

Question 483308: So I forgot how to do my proportions, and am not completely sure how to solve a problem as follows:
10:y::3:5
Any suggestions?
Click here to see answer by Earlsdon(6294)

Question 483501: how to solve x/3=x+2/5

Click here to see answer by jim_thompson5910(35256)

Question 482750: solve the proportion
Click here to see answer by bucky(2189)

Question 484745: A profit of $2400 is to be divided among three people in a 7:3:2 ratio. How much should each person receive?
Click here to see answer by Deina(147)

Question 484770: (2x+3y)(x-y)
Click here to see answer by Tatiana_Stebko(1539)

Question 484777: . There are pepsi 1 litre & oil 1 litre .it is given as 1 spoon of pepsi is aken and is mixed with Oil. Then 1 spoon oil&pepsi is taken and is mixed with pepsi then which of the condition holds true.
Click here to see answer by Alan3354(69443)

Question 485617: 22 miles/hour = _____feet/second
Click here to see answer by Alan3354(69443)

Question 485807: when the cost of the car is multiplied by 0.05 the result $1760. find the cost of the car
Click here to see answer by rfer(16322)

Question 485824: 4/7x = 4/5
Click here to see answer by rfer(16322)

Question 486149: In a picture of an ant the length is 6.5 centimeters. The actual size of the ant is 1.3 centimeters. What is the scale of the illustration?
Click here to see answer by chessace(471)

Question 486148: using dimensional analysis and convert the rate 12 feet/second = _____________yards/minute
Click here to see answer by chessace(471)

Question 486344: a fishing boat lowers a net from the surface of the ocean the expression d = 2t represents the depth of the net in feet after (t) seconds which integer represents the depth of the net after 8 seconds

Click here to see answer by Tatiana_Stebko(1539)

Question 486713: If the unemployment rate is 5.8% and there are 23,200 unemployed how many are working?
Click here to see answer by Tatiana_Stebko(1539)

Question 487202: please help me solve this 32 is 12% of what number ?
Click here to see answer by jorel1380(3719)

Question 487594: a. (9-5)-(6-8)=
b. Which expression has the smallest value (-4), (-8), (7) or (16)?
Thank you so much!
Click here to see answer by richard1234(7193)

Question 488055: The Dallas Maverick and the Houston Rockets each played 45 games the Mav won 60% of the games they played. The Houston Rockets won 2/3 of the games they played. How many more games did the Houston Rockets win over the Dallas Mavericks.
Click here to see answer by John10(297)

Question 488460: solve for porportions 2/x-3=5/x-2
Click here to see answer by Gogonati(855)

Question 488767: use two unit multipliers to convert 4000 ft to centimeters.
Click here to see answer by stanbon(75887)

Question 488864: Lila paid $45.25 for a pair of jeans. If she spent 8% of that amount in sales tax, how much tax did she pay?
Click here to see answer by mananth(16946)

Question 489031: I need help on solving a proportion problem. Could you help me by showing me step by step. 3r-2 all over r = 7 over 8
Click here to see answer by Theo(13342)

Question 489159: I don't understand hoe to solve this word problem. It says King Kong and Godzilla are both busily destroying cities. The ratio of cities destroyed by King Kong tp those destroyed by Godzilla is 2:5. If the two together destroy a total of 35 cities, find how many cities each destroyed. Use the 5-step method. please include a check.
thank you

Click here to see answer by jorel1380(3719)

Question 489598: Pipe A can fill in 20 minutes and Pipe B in 30 mins
and Pipe C can
empty the same in 40 mins.If all of them work
together, find the time
taken to fill the tank
Click here to see answer by mananth(16946)

Question 489650: In direct variation, as one variable increases, does the constant increase, decrease, or remain the same?
thak you

Click here to see answer by mananth(16946)

Question 489672: x varies directly with y and inversely with z. If y is quadrupled and z is quadrupled, how does x change?
thank you for your help
Click here to see answer by mananth(16946)

Question 489718: Please answer the following question with steps and explanation (I am very confused on this problem).
2 = x-2
___ ____
x-3 6
Thanks :)
Click here to see answer by chessace(471)

Question 490095: If a runner can run 3 miles in 25 minutes how long should it take to run a 26 mile marathon?
Click here to see answer by josmiceli(19441)

Question 490095: If a runner can run 3 miles in 25 minutes how long should it take to run a 26 mile marathon?
Click here to see answer by MathTherapy(10551)

Question 490707: If p is directly proportional to q, and p=18 when q=3, find q when p is 48
Click here to see answer by John10(297)

Question 490976: What is "x"?
$8.16/3 lb. = x dollars/1 oz.
Click here to see answer by Alan3354(69443)

Question 491122: You have a bag of marbles.There are twice as many blue marbles as red marbles. there are 4 less green marbles than red marbles. If there are 28 marbles i the bag, how many of each marble is in the bag?
thank you
Click here to see answer by solver91311(24713)

Question 491124: A. You have a bag of marbles.There are twice as many blue marbles as red marbles. there are 4 less green marbles than red marbles. If there are 28 marbles i the bag, how many of each marble is in the bag?
B. Based on your answer to A, what is the probability of drawing a green marble from the bag?
thank you
Click here to see answer by solver91311(24713)

Question 492519: I got -63/16 as an answer but i don't know how to check it. the problem is,
y/9=-7/16! HELP! thanks a billion :)

Click here to see answer by ankor@dixie-net.com(22740)

Question 494552: 7/3 over y = 1/3 over 6???
Click here to see answer by stanbon(75887)

Question 494970: I am doing problems on proportions equations, and I do not know where to start. I am supposed to write an equation, then solve. The problem is this: The product of 31 and x is equal to the sum of x and 150. Solve for x.
Click here to see answer by scott8148(6628)

Question 495227: if there are three brothers with ratio 2:3:5 and the age of older brother is 15 then find the age of other brothers
Click here to see answer by ankor@dixie-net.com(22740)

Question 499028: Bob Brown bought two plots of land for a total of $110,000. On the first plot, he made a profit of 16%. On the second, he lost 4%. His total profit was $9600.
How much did he pay for each piece of land.
Click here to see answer by josmiceli(19441)

Question 499209: Resturant bill including 20% tip is $180.00, what was the bill before the tip? I don't know how to setup the problem to solve
Click here to see answer by nerdybill(7384)

Question 499105: please help me convert 0.025 days to seconds
Click here to see answer by ankor@dixie-net.com(22740)

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