### Ratios and Proportions

The ratio of taxis to private automobiles int imes square @ 6pm on New Year's Eve was estimated to be 15 to 2. If there were 60 taxis, then how many private automobiles were there?

Explore BrainMass

- Anthropology
- Art, Music, and Creative Writing
- Biology
- Business
- Chemistry
- Computer Science
- Drama, Film, and Mass Communication
- Earth Sciences
- Economics
- Education
- Engineering
- English Language and Literature
- Gender Studies
- Health Sciences
- History
- International Development
- Languages
- Law
- Mathematics
- Philosophy
- Physics
- Political Science
- Psychology
- Religious Studies
- Social Work
- Sociology
- Statistics

The ratio of taxis to private automobiles int imes square @ 6pm on New Year's Eve was estimated to be 15 to 2. If there were 60 taxis, then how many private automobiles were there?

Perform the operation. x 3x --------------- - ------------- x^2 - 2x - 3 x^2 - 9

1 3 4 + -------- = - ----- w -2 w -3

y^2 - 10y + 21 --------------------- 6y^2 - 54

4 2-3x --------- + ----- x + 2 x

1. 2 sizes of Jam 14 ounces for $1.29 or 32 ounces for $2.99 Which is the better buy? 2. The price of bread increased $1.39 to $1.49. To the nearest tenth of a percent what is the increase? 3. A college had a 1.5% decrease in students. If there were 22,400 students before the decrease how many students are there now?

Attendance at the Fireman's Ball has been declining. Each year, the number attending is 2/3 of the previous year's attendance and the cost of food is 3/4 that of the previous year. 1) In what year will the attendance be less than 1/3 the original attendance? 2) There was $1,200.00 worth of food the first year. What is the d

Working together to get the job done. Betty and Frank, working together , can paint the exterior of a house in 3 days. Frank, by himself, can complete the job in 8 days less than Betty. How long will it take Betty to complete the job by herself?

Derive the wave eqation in 2 dimension. Give and and sovle any two examples of problem for wave eqn in 2D. Note: Please derive the equn in such a way that any one with basic understanding of PDE would easly grasp the procedure. make comment where needed. Thanks

1. Map is laid out in such a way that 1/2 inch equals 11 1/4 miles. How many miles are represented by 5.4 in? 2. If eggs cost 81 cents a dozen, how much would 2/3 dozen cost? 3. Williams sends 1/4 of his pay home each month. If his wife saves 1/3 of the amount he sends, what part of his pay is saved. 4. For the first three mo

Please use Partial Fractions to find the sum of the series below. Please show/explain each step in the solution. Thank you ∞ ∑ ________6________ n=1 (2n - 1) (2n + 1 )

1. Housing rates have rapidly increased, and you have decided to save to buy your first house. You expect to save $1500 per month at the end of each month for the next 3 years, investing these funds in a mutual fund you expect to earn 6.5% interest, compounded monthly. At the end of three years of savings, you will buy the hou

3. In two hours, Allice drove her car the same distance that Gene drove his car in 2 hours and 30 minutes. Find the speed of Gene's car given that he drove 10 mph slower than Alice drove. 4. A cruiser and a submarine leave the same port at the same time and travel eastward. The cruiser average 18 mph and the submarien 42 m

1) I am saving for my two children. One child will enter college in 5 years, while the other child will enter college in 7 years. College costs are currently $10,000 per year and are expected to grow at a rate of 5 percent per year. All college costs are paid at the beginning of the year. I assume that each child will be in coll

Leave the answer as improper fraction 1) 8/35-11/35+17/35 2) 4 6/7 + 2 8/11 3) 6 19/21 -(-2 1/3) 4) 7 2/7 - 4 5) 9/13 + 3 1/4 6) 3 7/12 - (15/12-9/12) 7) -3 5/9 - 2 1/7 + 4 2/3 8) 11/12+5/12 - x = 9/12 9) 4 7/8 + 1 3/5 - x = 3 39/40 evaluate 7x/15 - 2x/9=

3 different equivalent fractions for each. 1) 2/3 2) 5/9

Please explain the following ratios and proportions: 1) 45 cm to 1 m 2) 10xy+ 2y/4y 3)(9x-6y)/3 4)(2x*2y/4y) 5) (x+y)/(x*2-y*2) 6) (x*2+7x+12)/(x+4)

-9/7 x (-6) x 5/8 =

5/-4 - -9/7 =

A consumer's group checked the gasoline mileage (to the nearest mile per gallon) on 25 different cars. The following gives a summary of the findings: Miles Per Gallon Frequency Less than 15 2 16-20 4 21-30

1. Solve _________ 2/x +4 = 5 2. Solve 1 1 3 ------ + ---- = ---- 2x -4 x-2 2 3. x^2 + 3x -10 x^2 - x - 2 ----------------- -:- ------------ x^2 - 2x-35 x^2 - 6x -7 4. x 3 ------

Solve each equation 12. 48. Solve each equation 29. 30. 37. 39. Solve each proportion 30. 47. Basketball blow out. As the final buzzer signaled the end of the basketball game, the Lions were 34 point ahead of the Tigers. If the Lions scored 5 points for every 3 scored by the tigers

1) Acetate, Inc., has equity with a market value of $20 million and debt with a market value of $10 million. The cost of the debt is 14 percent per annum. Treasury bills that mature in one year yield 8 percent per annum, and the expected return on the market portfolio over the next year is 18 percent. The beta of Acetate's equit

Girth is distance around. If volume is 35 cubic feet, when height is 20 feet and the girth is 5 feet. What is the heigth when the volume is 85.75 feet and the girth is 7 feet?

I can get the answers usually by calculator but I need to show my work. (5^2/3)^7/2 (3^1/2)(12^1/2) 5^200 / 5^-201 (5^1/2)(11^1/2) (21^1/2)(21^1/2) also writing a decimal as a fraction in simplest form ___ .0204 = 68/333 by calculator but how would I show my work without using a calulator.

I have started this problem but I cannot figure out what im doing wrong or if I am even go about the problem the right way. Could somebody please help? 1. Arianne casts a shadow of 6m. If she measures 160cm, how tall is a tree that casts a shadow of 10m. show all calculations. 6/10 = x/1.6 10x = 6 x 1.6 10x = 9.

Kent can Paint a certain house by himself in x days. His helper Keith can paint the same house by himself in x + 3 days. Suppose that they work together on the job for 2 days. To complete the table, use the fact that the work completed is the product of the rate and the time. Write a Rational expression for the fraction of th

Consider an infinite layer of fluid held between two planes z=0 and z=δ such that the temperature of the bottom boundary is... Please see attached for full question.

Students with a class size of under 30,have finished their tests. One third of the class received a "B," one quarter a "B-",and one sixth a "C". One eighth of the class Failed. How many students in class received an A?

Perform the indicated subtraction x/x^2-2x-3 - 3x/x^2-9