The profit (SP) of selling a mobile phone is partly constant and partly varies directly as thenumber of phones (n) sold. When 20 phones were sold, the profit will be $3,000. When 25phones were sold, the profit will be $5,400.(a) Express P in terms of n.(b) Find the profit when 40 phones were sold.(c) Find number of phones were sold if the targets profit is $23,640?

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Answered: The profit (SP) of selling a mobile…

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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An elementary school is taking a busload of children to a science fair. It costs $140.00 to drive the bus to the fair and back, and the school pays each student's $4.00 admission fee. a). Express the trip's cost C(n) as a linear function of the number of children n who make the trip. (Use lower-case letter n.)C(n) = b). Identify the slope and y-intercept of your linear function. m = b = c). Solve for n when C(n) = 164.n = d). Calculate C(15).$ e). Explain in practical terms what C(15) means.C(15) represents the cost of the science fair trip if ______ children make the trip.
22 percent of students are male. 33 percent of students take a Statistics course. 48 percent of male students take statistics. Give your answers as a decimal to 4 decimal places.(a) What percent of students are male that take a statistics course? (b) What percent of students are females that take a statistics course?
The pool Entertainment Company learned that by pricing a pool toy at GH¢10, local sales will reach 200 a week. Lowering the price to GH¢9 will cause sales to rise to 250 a week. (a) Find an expression relating price and sales assuming it is linear
Q5. (i) Prices of chocolates each (OMR.): 0.10, 0.19, 0.11, 0.19, 0.17, 0.12, 0.12, 0.12, 0.10, 0.11, 0.13, 0.10, 0.09, 0.11, 0.15,0.13, 0.10, 0.18, 0.09, 0.07, 0.08, 0.06, 0.08, 0.05, 0.07, 0.08, 0.08, 0.07, 0.09, 0.06,0.07, 0.08, 0.07, 0.07, 0.07, 0.08, 0.06, 0.07, 0.06Using 6 class intervals with the lowest starting at 0.05.Set up frequency distributionConstruct frequency histogram (ii) How many ways of four-digit odd numbers can be formed from the set of digits A= {5,6,2,7,4,9,3} if the repetition of digit is not allowed
The cost, C (in $), to rent a car for n days from the EZ4U rental company is given by the linear function C = 45n + 30. Interpret the meaning of each of the following in the context of this application. (a) Interpret the slope. (b) Interpret the C-intercept.
The percent of high school students who smoked cigarettes on 1 or more of the 30 days preceding the survey is given by y = -0.064x² +0.277x +33.715, where x is the number of years after 1990. During what years from 1990 on is the percent greater than 30%? From to the percent is greater than 30%. (Round up to the nearest year as needed.)
29 percent of young adult males play video games. 40 percent of young adult males have a full-time job. 46 percent of young adult males that play video games also have a full-time job. Give your answers as a decimal to 4 decimal places. (a) What percent of young adult males play video games and have a full-time job? (b) What percent of young adult males play video games or have a full-time job?
For each $1 increase in the price of a $300 plane ticket, an airline will lose 60 passengers, so if the ticket price is increased to $x, the decrease in passengers is modeled by 60(300 – x).Determine whether the statement makes sense or does not make sense, and explain your reasoning.
What would ý be if the intercept equals 5.04 and the b equals 1.05 for an X of 8?
For many florists, the days leading up to Valentine's Day are among the busiest of the year. An owner of a florist wanted to estimate the average sale amount for all sales made on the day before Valentine's Day, February 13th. When she had time she wrote down the sale price of a transaction of fresh flowers on a sheet of paper. By 3pm she had collected n=44 sale prices of all flower sales that were made day. The variable of interest is the total euro amount of each purchase. During her quick tea-break she calculated the average sale price of the 44 sales as 80.05 euro and found that they varied with a standard deviation of 20.3 euro. Estimate the value of the population mean, µ, the true mean sale amount of all sales on February 13, by calculating a 95% confidence interval. Fill in the blanks in the following: An estimate of the population mean is . The standard error is . The distribution is (examples: normal / t12 / chisquare4 / F5,6). For a 95% confidence interval the…
Chloe has a part-time job at an ice skating rink selling hot cocoa. She decided to plot the number of hot cocoas she sold relative to the day's high temperature and then draw the line of best fit. What does the line's y-intercept represent? A prediction of the temperature when o hot cocoas are sold. A prediction of the number of hot cocoas sold when the temperature is 0∘F . The actual temperature when o hot cocoas are sold. The actual number of hot cocoas sold when the temperature is o∘F .

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