# Questions on Algebra: Proportions answered by real tutors!

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 Algebra: Proportions Solvers Lessons Answers archive Quiz In Depth

 Question 120904: Three numbers are in the ratio 2:4:7. If the first number is multiplied by 4, the result is 9 less than the sum of the other two. find all three numbers. Click here to see answer by ankor@dixie-net.com(15746)

 Question 120902: Two angles of a triangle are in the ratio 3:4. The third angle is 15 degrees less than twice the first angle. Find all three angles. Click here to see answer by ankor@dixie-net.com(15746)

 Question 120892: A varies directly as h. A = 48 when h = 4. Find h when A = 36 Click here to see answer by ankor@dixie-net.com(15746)

 Question 120890: solve for x: 5 over x+2 = 4 over x Click here to see answer by ankor@dixie-net.com(15746)

 Question 120896: A record rotates 100 times in 3 minutes. If side A plays for 22 minutes and 30 seconds, how many times will it rotate? Click here to see answer by stanbon(57967)

 Question 121348: A man who is 75 inches tall is 15 inches on a TV monitor. The image of his friend is 13 inches tall on monitor. How tall is his friend. Click here to see answer by checkley71(8403)

 Question 120891: solve for X: 3x+3 over 3 = 7x-1 over 5 Click here to see answer by HyperBrain(694)

 Question 121489: If y varies directly with x and y = 12 when x = 9, find x when y = 15 Click here to see answer by checkley71(8403)

 Question 121521: the ratio of students who rode horses to school to students who walked to school was 2 to 9. if 18 students walked to school, how many rode horses to school? Click here to see answer by Earlsdon(6294)

 Question 121488: The ratio of the length to the width of a rectangle is 5:4. If the length is increased by 8 and the width halved, the ratio of the length to the width of the new rectangle is 7:2. Find the dimensions of the original rectangle. Click here to see answer by jaymore(5)

 Question 121828: A brachiosaurus weighed 80,000 kg, but it's brain weights only .2 kg. What would your brain weigh if you were 150 pounds if your ratio was the same as the brachiosaurus? Click here to see answer by checkley71(8403)

 Question 122851: The ratio of females to males in a school band is 7 to 4. If three females and twelve males are absent from practice, the ratio of females to males is 5 to 2. How many members of the band attended practice? Click here to see answer by ankor@dixie-net.com(15746)

 Question 123467: x-r-3/y-s-5 = r/s = 3/5. What is the value of x/y? Click here to see answer by jim_thompson5910(28715)

 Question 123664: I'm sorry, but I miswrote the problem. Thanks again! The question is: Solve for y: y+10/y+3 = y+1/y-1 y = (?) Click here to see answer by nadinadan(32)

 Question 123873: I do not understand this..I have to write a system of 2 equations in 2 unknowns and solve each system by substitution. thanks so so much Click here to see answer by applesrbest(7)

 Question 124295: Use a proportion to answer the question in terms of y. What percent of 6y is 24? Please provide rules for answering questions of this type. My daughter left her book at school, so I can not look at it to determine the way to work it. Thank You Click here to see answer by stanbon(57967)

 Question 123832: The local movie theater sold 100 tickets for \$390. If children's tickets cost \$3 and adult tickets cost \$6, how many of each were sold? Click here to see answer by awang1996(50)

 Question 122401: This term, 36% of the students in one class are on the honor roll. If 9 students are on the honor roll, how many students are in the class? Click here to see answer by awang1996(50)

 Question 122396: A refrigerator was discounted 30% of the original price. The discounted price is \$447.30. What was the original price? Click here to see answer by awang1996(50)

 Question 122397: the Pro Shop sold 6 of 20 tennis rackets in May. What percent of the tennis rackets were sold? Click here to see answer by awang1996(50)

 Question 124977: In a car park, the ratio of red cars to green cars is 5:6, while that of green cars to blue is 3:10.Find the ratio of red cars to blue cars. Click here to see answer by checkley71(8403)

 Question 125061: In a rectangle, the ratio of the length to the width is 5:4. If the rectangle is 30 inches long, find its width. (Points: 1) Click here to see answer by edjones(7569)

 Question 125585: a recipe requires 3 cups of flour to make 27 dinner rolls. how muck flour is needed to make 9 rolls Click here to see answer by stanbon(57967)

 Question 125576: eleanor can complete two skirts in 15 days. how long will it take her to complete eight skirts Click here to see answer by stanbon(57967)

 Question 125579: kens new car can go 26 miles per gallon of gasoline. the cars gasoline tank holds 14 gallons. how far will he be able to go on a full tank. Click here to see answer by checkley71(8403)

 Question 125610: three eggs are required to make two dozen miffins. how many eggs are needed to make 12 dozen muffins? Click here to see answer by SoOoDumb(14)

 Question 125749: swiming pool contains 14000 gallons of water, how many gallons of chlorine do you need to add to get a 33 percent mixture? Click here to see answer by checkley71(8403)

 Question 125612: a contractor estimates it will coast 2,400 to build a deck to a customers specifications. how much would it cost to build 5 more identical decks? Click here to see answer by checkley71(8403)

 Question 125791: Can someone help me with this problem please? The surface area of a sphere is directly proportional to the square of its radius. The volume of the sphere is directly proportional to the cube of the radius. Find the percentage increase in volume of the sphere if the surface area is increased by 25%. My work so far: Surface Area = S = 4πr^2 Radius = r Volume = V = 4/3 πr^3 S ∝ r^2 V ∝ r^3 125% = 5/4 I tired to calculate the value of V/S as a start and got V/(S )= r/3 Then I got stuck. Hope you can help Click here to see answer by kev82(148)

 Question 125581: three eggs are required to make two dozen muffins. how many eggs are nedded to make 12 dozen muffins Click here to see answer by awang1996(50)

 Question 121889: Find the scale used to create the model: What is scale model of a 72-inch long table is 8 inches long? Click here to see answer by awang1996(50)

 Question 126100: A garden is 8 feet wide by 16 feet long. Make a scale drawing of the garden that has a scale of 1/4 in. = 2ft. Click here to see answer by checkley71(8403)

 Question 126210: What is the actual length of a room that measures 2.8 inches. the scale is 1/2 inch = 4 feet? If a model airplane is 11 inches in length. the actual length of the airplane is 209 feet. what is the scale used to build the model? Click here to see answer by edjones(7569)

 Question 126525: I think the problem is "Proportions". I can't find how to do it in my math book. 5 5 - (-2) = - x 4 The problem above is '5 over x, minus 2, equals five over four. The answer is 20 over 13. I need to know how to get that answer. Click here to see answer by scott8148(6628)

 Question 126814: The volume of a rectangular pool is 1,080 cubic meters. Its length, width, and depth are in the ratio 10:4:1. Find the number of meters in each of the three dimensions of the pool. Click here to see answer by Earlsdon(6294)

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