Tutors Answer Your Questions about Linear-systems (FREE)
Question 471616: A rental car agency charges $15 per day plus 11 cents per mile to rent a certain car. Another agency charges $21 per day plus 5 cents per mile to rent the same car. How many miles will have to be driven in one day for the cost of a car from the first agency to equal the cost of a car from the second agency in one day? (Express the problem as a system of linear equations and solve by any method).
Click here to see answer by jorel1380(2518)   |
Question 471617: Tasty Bakery sells three kinds of muffins: chocolate chip muffins at 30 cents each, oatmeal muffins at 35 cents each, and cranberry muffins at 40 cents each. Charles buys some of each kind and chooses twice as many cranberry muffins as chocolate chip muffins. If he spends $4.65 on 13 muffins, how many oatmeal muffins did he buy?
Click here to see answer by jorel1380(2518) |
Question 473168: There are 357 calories in two slices of bread and three eggs. There are 217 calories in one slice of bread and two eggs. How many calories are in a slice of bread and how many are in an egg
Click here to see answer by karaoz(32)  |
Question 473955: In 1992 the life expectancy of males in a certein country was 64.1 years. In 1996, it was 66.5 years. let E represent the life expectancy in year t and let t represent the number of years sence 1992.
The linear function E(t) that fits the data is?
Click here to see answer by josmiceli(9668)  |
Question 474504: I tried solving this system of equations, but my answer seems totally off. If someone could please show me where I went wrong, I'd appreciate it!
Solve the system of equations using the elimination method.
4x+3y=3
5x-9y=144
I multiplied the second equation by 3 to eliminate the y variable. After adding the two equations and solving for x, I got 10 1/17.
+ 
__________________
Then I substituted my x-value into the original first equation to solve for y.
Thus, my answer was (171/17, -211/17)
Click here to see answer by mananth(12270)  |
Question 474622: Part 1: Decide whether you would use the graphing, substitution, or elimination method to solve the following system of equations. Explain, in complete sentences, why you chose that method.
Part 2: Solve the following system of equations and show all of your work.
2x + 5y = −3
−15x − 5y = −10
Click here to see answer by richard1234(5390)  |
Question 474909: 6. Our equation y = 2.09x + 15.50 represents our charge for hats. An estimate from a competing company, Lotsa Hats, was -2.09x + y = 13.30.
A. Do you expect these lines to be parallel, perpendicular, or intersecting? Why?
B. Use the equations to determine if the lines are parallel. Are they? Why or why not?
Click here to see answer by mananth(12270) |
Question 474969: how do I work out the answer to this equation 1/r-1/[r(1+r)^t] in the equation r is the annual interest rate and t is th length of time in years,in this case the interest rate r is 8% and the time in years t is 70. i think the answer is 12.4428. but in what form of maths do i work it out in. please help thank you
Click here to see answer by stanbon(57290) |
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