Tutors Answer Your Questions about Proportions (FREE)
Question 1036833: Given that X is inversely proportional to the square of Y. It is known that x = 8 for a particular value of Y. When Y is increased bu 200%, find
(a) the value of X,
(b) the percentage change in the value of X
Click here to see answer by Boreal(15235)  |
Question 1036561: Kate makes a donation to a charitable organisation on a monthly basis. Her monthly donation is directly proportional to the square of her monthly savings. If she saves $900 and $1200 in January and February respectively, her donation increases by $35 from January to February. Find the amount of money she donates to the charitable organisation in each of the two months.
Click here to see answer by jorel555(1290) |
Question 1037513: John spent the following amounts of time building a workbench.
drawing plans two hours.
cutting the wood hour-and-a-half.
assembling the workbench 2 hours.
sanding and selling three and a half hours.
what is the ratio of time spent cutting wood to total time spent on the project.
Click here to see answer by Theo(13342)  |
Question 1039059: A map is drawn so that every 3.3 inches on the map corresponds to an actual distance of 80 miles. If the actual distance between the two cities is 480 miles, how far apart are they on the map?
The two cities are __ inches apart on the map
Click here to see answer by addingup(3677)  |
Question 1039804: Hi,
I'm stuck on this problem and would appreciate any help given:
You mix 2/5 cups of red paint for every 1/4 cup of blue paint to make 1 5/8 gallons of purple paint.
a) how much red and blue paint do you use?
B) You decide that you want to make a lighter purple paint. You make the new mixture by adding 1/10 cup of white paint for every 2/5 cup of red paint and 1/4 cup of blue paint. How much red, blue, and white paint do you use to make 3/8 gallon of lighter purple paint?
Thank you so much. This is quite a long problem so I appreciate any and all efforts taken to solve it. Thanks.
Click here to see answer by stanbon(75887) |
Question 1040218: A chemist needs 6 liters of a 10%
alcohol solution but has only a
15% alcohol solution. How many liters each of the
15% solution and water should he mix to make the desired
6 liters of 10%
solution?
The chemist needs to mix
___ liters of
15% alcohol solution with
___ liters of water.
Click here to see answer by josmiceli(19441)  |
Question 1042637: I think this is a basic question. But it has been 10 years since I had any algebra and I have to take a placement course for college courses. Here is my problem: "if the total cost of x apples is b cents, what is a general formula for the cost, in cents, of y apples?"
I believe I know the answer to this problem, but I need help in understanding why this is the answer. I can get to "by/x" , but I don't remember why I am going through these motions. Is there a law or property that is involved in this problem?
Click here to see answer by josmiceli(19441)  |
Question 1042637: I think this is a basic question. But it has been 10 years since I had any algebra and I have to take a placement course for college courses. Here is my problem: "if the total cost of x apples is b cents, what is a general formula for the cost, in cents, of y apples?"
I believe I know the answer to this problem, but I need help in understanding why this is the answer. I can get to "by/x" , but I don't remember why I am going through these motions. Is there a law or property that is involved in this problem?
Click here to see answer by ikleyn(52776)  |
Question 1042729: Hasan can do a job twice as fast as Jawed. Sameer can do a job as fast as Hasan and Jawed working together. If a certain job is completed in 4.5 hours by Jawed, how long it would take sameer to complete the same job?
A. 0.5 hour
B. 1 Hour
C. 1.5 Hours
D. 2 Hours
Click here to see answer by stanbon(75887) |
Question 1042841: Suppose that y is inversely proportional to x and that y equals seven ninths when x=81. Complete parts (a) and (b).
(a) Find the constant of proportionality k.
kequals=
(b) Use y equals StartFraction k Over x EndFractiony=
k
x to find y when xequals=7.
yequals=
I need help on three questions please
Click here to see answer by josgarithmetic(39616) |
Question 1043680: Ashok spends 1/8 of the money for mangoes and 1/7 of the remaining money for sweets and then with the left over money, he goes to a bakery and spends 1/6 of the money to buy bread for his father and with the remaining money, he spends 1/5 and buys flowers for his sister and from the amount left over, he buys a cricket ball by spending 1/4 of the amount. Now, he is left with 48. How much money Ashok had at the beginning?
Click here to see answer by josmiceli(19441)  |
Question 1045905: Lynn wants to find the height of the tallest building in her city.she stands 199 feet away from the building. Theread is a tree 42 feet in front of her that is 25 feet tall.how tall is the building to the nearest foot?
Click here to see answer by jorel555(1290) |
Question 1047238: Good Morning! Hopefully this fits into the category of Proportions. We have a real situation where we're hoping to fit a heavy object into a given space. Because of smaller solid barriers at the entry of the space the object (a microwave oven) must be placed into the space length-wise (rather than width-wise). The question is whether or not, once into the space, the object can be twisted 90 degrees into it's desired orientation. The height of both the space & object along with the depth of the space do not play into consideration of the problem.
Space: 23.5 inches wide
Object: 21.9 inches wide & 17.35 inches deep
Thank you for tackling this query, John
Click here to see answer by Theo(13342)  |
Question 1047238: Good Morning! Hopefully this fits into the category of Proportions. We have a real situation where we're hoping to fit a heavy object into a given space. Because of smaller solid barriers at the entry of the space the object (a microwave oven) must be placed into the space length-wise (rather than width-wise). The question is whether or not, once into the space, the object can be twisted 90 degrees into it's desired orientation. The height of both the space & object along with the depth of the space do not play into consideration of the problem.
Space: 23.5 inches wide
Object: 21.9 inches wide & 17.35 inches deep
Thank you for tackling this query, John
Click here to see answer by KMST(5328)  |
Question 1047698: Suppose M is jointly proportional to x and y and inversely proportional to the square of z. If x is doubled, y is decupled, and z is tripled, is the value of M changed, and if so, by what factor?
Thanks!
Click here to see answer by Theo(13342)  |
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