Questions on Algebra: Proportions answered by real tutors!

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Question 1063916: the final price of Cathy�s sweater after all the discounts was
$2.50. Assume that Cathy got 20% off her Holiday Bonus Bucks. What was the original price of
the sweater?
Click here to see answer by jorel1380(3719)

Question 1076361: If 4 sweaters cost $29.08, how much would 7 sweaters cost?
Click here to see answer by Alan3354(69443)

Question 1076545: A hollow cylinder has radius r cm and height 6r cm.
3 spheres, also of radius r cm, are put into the cylinder.
Work out the proportion of the cylinder that is not filled by the spheres.
Click here to see answer by Alan3354(69443)

Question 1076546: Hayley rolls spins a biased coin and rolls a biased dice.
The probability that the coin will land on heads is 0.55.
The probability that the dice will land on 6 and the coin will land on heads is 0.11.
Work out the probability that the coin will land on tails and the dice will land on 6.
Click here to see answer by math_helper(2461)

Question 1077592: Becker has 7 blue cars,4 green cars , and 8 red cars in his toy car collection.what is the ratio of red cars to green cars?
Click here to see answer by themasterofcircuits(27)

Question 1077757: can the ratios 2/9 and 5/27 make a porportion

Click here to see answer by Boreal(15235)

Question 1077759: The time period of a simple pendulum is directly related to the square root of its length. an 8 foot pendulum has a period of 3.2 seconds. find the period of a grandfather clock that has a pendulum of length 3 feet . Need help with developing the formula to solve problem.
Click here to see answer by amfagge92(93)

Question 1078623: The braking distance of a vehicle is directly proportional to the square of its speed. when the speed of the vehicle is b m/s, its braking distance is d m. if the speed of the vehicle is increased by 200%, find the percentage increase in its braking distance.
Click here to see answer by Theo(13342)

Question 1078679: y is directly proportional to x^2 and y=a for a particular value of x. Find an expression for y in terms of a, when this value of x is doubled.

Please help me with this!! Thank you.
Click here to see answer by akch2002(12)

Question 1078613: y is directly proportional to x^2 and y=a for a particular value of x. Find an expression for y in terms of a, when this value of x is doubled.
Please help me with this as fast as possible. I'm in hurry! Thank you.
Click here to see answer by KMST(5328)

Question 1078848: Tap A takes 6 min to fill a tank and Tap B takes 9 min to fill the same tank. Pipe C can empty the tank in 15 min. How long will it take to fill up the tank if the pipe is in use when both taps are turned on?
Please help me with this as soon as possible!! Thank you.
Click here to see answer by josgarithmetic(39616)

Question 1078849: A contractor agrees to lay a road 3000 m long in 30 days. 50 men are employed and they work for 8 hours per day. After 20 working days, he finds that only 1200 m of the road is completed. How many more men does he need to employ in order to finish the project on time if each man now works 10 hours a day?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1079226: It is given that z is directly proportional to x^2 and inversely proportional to √y.
(i) Write down an equation connecting x,y and z.
(ii) If z=16 when x=2 and y=9, find the value of z when x=5 and y=4.
Click here to see answer by Fombitz(32388)

Question 1079225: If A is directly proportional to C and B is directly proportional to C, prove that each of the following is directly proportional to C.
(a) A+B
(b) A-B
(c) √AB
Click here to see answer by Fombitz(32388)

Question 1079227: The time, T days, needed to paint some buildings is directly proportional to the number of buildings,B, that need to be painted and inversely proportional to the number of painters employed, P. 18 painters can paint 3 buildings in 20 days.
(i) Find an equation connecting T, B and P.
(ii) Find the number of days needed by 16 painters to paint 4 buildings.
(iii) If 10 buildings are to be painted in 24 days, how many painters need to be employed?
Click here to see answer by josgarithmetic(39616)

Question 1079319: A kilometer is about 5/8 mile. About how many miles are in 4 2/5 kilometers
Click here to see answer by josmiceli(19441)

Question 1079340: Solve the following proportions:
1 1/9:(0.8y)=1/7:3.6

Click here to see answer by MathLover1(20849)

Question 1079440: how would you simplify
would the lcd be (x+2)(x-4) then you would get
3(x-4)+7(x+2)
3x+12+7x+14
10x+26
but im not sure
Click here to see answer by rothauserc(4718)

Question 1079440: how would you simplify
would the lcd be (x+2)(x-4) then you would get
3(x-4)+7(x+2)
3x+12+7x+14
10x+26
but im not sure
Click here to see answer by MathTherapy(10551)

Question 1079831: Use a proportion to set up and solve the following problem. Round your answer to the nearest tenth if necessary.
A 9.1 ft tall adult elephant standing next to a telephone booth casts a 31.9 shadow. If the telephone booth casts a shadow that is 29.4 ft long, then how tall is it?
Click here to see answer by josmiceli(19441)

Question 1080241: what is 25% more than 714.87
Click here to see answer by Alan3354(69443)

Question 1080583: U+3v+(2u-3u)
Click here to see answer by Fombitz(32388)

Question 1080759: 16 workers complete their work in 38 days. In how many days will it take if 5 of the workers increase their work load by 60%?
Click here to see answer by Theo(13342)

Question 1081261: A jazz concert brought in $181,000 on the sale of 8,800 tickets. If the tickets sold for $15 and $25 each, how many of each type of ticket were sold?
Click here to see answer by addingup(3677)

Question 1081265: A publisher for a promising new novel figures fixed costs (overhead, advances, promotion, copy editing, typesetting, and so on) at $60,000, and variable costs (printing, paper, binding, shipping) at $1.10 for each book produced. If the book is sold to distributors for $15 each, how many must be produced and sold for the publisher to break even?
Click here to see answer by jorel1380(3719)

Question 1081264: A jazz concert brought in $165,500 on the sale of 8,100 tickets. If the tickets sold for $15 and $25 each, how many of each type of ticket were sold?
Click here to see answer by jorel1380(3719)

Question 1081919: If the measure of the second angle of a triangle is twice that of the first indicate the measure of the third angle
Click here to see answer by Boreal(15235)

Question 1082016: Please help me solve this problem: A school has 900 students. The ratio of students to teachers is 25:1. How many more teachers are needed to have a ratio of 20:1?
Click here to see answer by josgarithmetic(39616)

Question 1082369: Three miners can load 350 pounds of coal in 15 minutes.How many minutes would it take for two miners to load 700 pounds of coal.
Click here to see answer by josgarithmetic(39616)

Question 1082369: Three miners can load 350 pounds of coal in 15 minutes.How many minutes would it take for two miners to load 700 pounds of coal.
Click here to see answer by ikleyn(52776)

Question 1082368: Three miners can load 350 pounds of coal in 15 minutes.How many minutes would it take for two miners to load 700 pounds of coal.
Click here to see answer by ikleyn(52776)

Question 2624: I understand how to solve proportions but what I am having trouble with is if I have a question such as what is 25% of 48. Can you help me?

Click here to see answer by pro(1)

Question 1082382: In a High school there are two Form 5 classes with the same number of students
in each. The ratio of girls to boys in one Form 5 is 1 : 2 and in the other Form it is 3 : 2. What is the ratio of girls to boys in the entire Form 5?

Click here to see answer by Theo(13342)

Question 1083565: Given the table of values for s and t, write down a formula expressing s in term of t for these values :

Click here to see answer by Theo(13342)

Question 1084100: a lorry is to be loaded with sacks of potatoes each of mass 25 kg. how long it should take (i) 4 crew members to load 4 tonnes (ii) 8 crew members to load 1 tonne
Click here to see answer by ikleyn(52776)

Question 1084202: I read 2/3 of a book on first day and 3/5 of the remaining pages on second day still 40 pages left for the third day find out how many pages does the book contain
Click here to see answer by math_helper(2461)

Question 1084914: 19/20 minus 4/5

Click here to see answer by josgarithmetic(39616)

Question 1085015: Identify if true of false proportions
x^2+y^2=(x+y)^2
Click here to see answer by jim_thompson5910(35256)

Question 1085015: Identify if true of false proportions
x^2+y^2=(x+y)^2
Click here to see answer by ikleyn(52776)

Question 1085014: x^2+y^2 = (x+y)^2
Click here to see answer by ikleyn(52776)

Question 1085042: x^2+y^2 = (x+y)^2 Identify if true or false proportions please show solution for both x^2+y^2 and (x+y)^2

Click here to see answer by ikleyn(52776)

Question 1085052: Is f (x+3) same with f(�) + f(3)
show solution with explanation
Click here to see answer by Fombitz(32388)

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