For Exercises 75-80, use a graphing utility to approximate the solution (s) to the system of equations. Round the coordinates to
Want to see the full answer?
Check out a sample textbook solutionChapter 8 Solutions
ALEKS 360 ACCESS CARD PRECALCULUS 18 WK
Additional Math Textbook Solutions
A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)
Algebra and Trigonometry (6th Edition)
Calculus: Early Transcendentals (2nd Edition)
Intro Stats, Books a la Carte Edition (5th Edition)
Using and Understanding Mathematics: A Quantitative Reasoning Approach (6th Edition)
Basic Business Statistics, Student Value Edition
- The resistance of a copper wire carrying an electrical current is directly proportional to its length and inversely proportional to its cross-sectional area. A copper wire with a diameter of 0.0126inch has a resistance of 64.9ohms per thousand feet. What length of 0.0201-inch-diameter copper wire will produce a resistance of 33.5ohms?arrow_forwardThe distance a moving body travels, d, varies directly with time, t, it moves. A train travels 100 miles in 2 hours a. Write the equation that relates d and t. b. How many miles would it travel in 5 hours?arrow_forwardregression equation: Y= 11.5355x-58.77 If a new home is to have 3000 sq. ft. (i.e., 30 hundred sq. ft.), predict the price of the home using your regression equation.arrow_forward
- Solve 45 a, b, c, d, earrow_forwardThe electric power P of a direct current circuit is jointly proportional to the voltage V and the electric current I.Find a mathematical model for the verbal statement.arrow_forwardAssume the yearly savings in gasoline costs due to the purchase of a hybrid auto- mobile are $400 and the extra cost of purchasing the hybrid is $4500. a. Produce an equation of net savings over a period of x years. b. Graph this equation on an appropriate rectangular coordinate axis system and identify the point that indicates the number of years required to break even. How long does it take to break even?arrow_forward
- Sophia has already prepared 1 kilogram of dough and will continue preparing 1 kilogram of dough every hour write an equation that shows the relationship between the hours work x and the dough prepared yarrow_forwardThe maximum recommended heart rate M for adults is the difference of 220 and the person’s age a. Write a model to represent an adult’s maximum recommended heart rate in terms of age.arrow_forwardThe cost of driving a car includes both fixed costs and mileage costs. Assume that it costs $178.40 per month for insurance and car payments and $0.26 per mile for gasoline, oil, and routine maintenance. (a) Find values for m and b so that y = mx + b models the monthly cost of driving the car x miles. (b) What does the value of b represent?arrow_forward
- A) age of salma (x ). What is the age of Salma 6 years ago? B) After 10 years I will be twice as old as 6 years ago; Write the equation in terms of x.arrow_forwardThe total number t of items that a manufacturing company can produce is directly proportional to the number n of employees.arrow_forwardA person’s weight depends on both the number of caloriesconsumed and the energy used. Moreover, the amount of energyused depends on a person’s weight—the average amount of energyused by a person is 17.5 calories per pound per day. So, the moreweight a person loses, the less energy a person uses (assuming thatthe person maintains a constant level of activity). An equation thatcan be used to model weight loss isdw / dt = C 3500 -17.5 /3500 w where w is the person’s weight (in pounds), t is the time in days,and C is the constant daily calorie consumption Consider a person who weighs 180 pounds and begins a diet of2500 calories per day. How long will it take the person to lose10 pounds? How long will it take the person to lose 35 pounds?arrow_forward
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageGlencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
- Elementary AlgebraAlgebraISBN:9780998625713Author:Lynn Marecek, MaryAnne Anthony-SmithPublisher:OpenStax - Rice University