Tutors Answer Your Questions about Systems-of-equations (FREE)
Question 288664: Find the points of intersection, if any, of the graphs in the system. Give the solution of: 4x^2 - 56x + 9y^2 + 160 = 0 and 4x^2 + y^2 - 64 = 0. Please and thank you. please please help me find the right solution for x and y, I had some help and they told me that the equation to solve was 4x^2-56x+9-(-4x^2+64)+160=0, but I'm stuck on how to solve this, please help! thank you
Click here to see answer by jim_thompson5910(35256)  |
Question 289015: Hi Thank you for your help. I think this may be the topic.
I've been trying to figure out this word problem, but for some reason I think the answer is 40 miles:
A car rental agency rents a certain car for $40 per day with unlimited mileage or $24 per day plus $0.20 per mile. How far can a customer drive this car per day for the $24 option to cost no more than the unlimited mileage option?
I have set up like this: 0.20x + 24y (less than or equal to) 40 and I solved for X by making y 0 and dividing 40 by .20 which gave me 200. Then I multipied that by $0.20 per mile which gave me the answer of 40. Please let me know where I went wrong or if I even understood the question.
Thank you!
Click here to see answer by Deina(147)  |
Question 289015: Hi Thank you for your help. I think this may be the topic.
I've been trying to figure out this word problem, but for some reason I think the answer is 40 miles:
A car rental agency rents a certain car for $40 per day with unlimited mileage or $24 per day plus $0.20 per mile. How far can a customer drive this car per day for the $24 option to cost no more than the unlimited mileage option?
I have set up like this: 0.20x + 24y (less than or equal to) 40 and I solved for X by making y 0 and dividing 40 by .20 which gave me 200. Then I multipied that by $0.20 per mile which gave me the answer of 40. Please let me know where I went wrong or if I even understood the question.
Thank you!
Click here to see answer by richwmiller(17219)  |
Question 289082: Which ordered pair is a solution of the system of equations y=x^2-x-20 and
y=3x-15?
I did do some work i did
y=x^2-x-20
y=(x^2-5x)(4x-20)
y= x(x-5) 4(x-5)= y=(x+4)(x-5)
and
y=3x-15
y=3(x-5)
but i don't know what to do from there, i would appreciate the help
Click here to see answer by Fombitz(32388)  |
Question 289082: Which ordered pair is a solution of the system of equations y=x^2-x-20 and
y=3x-15?
I did do some work i did
y=x^2-x-20
y=(x^2-5x)(4x-20)
y= x(x-5) 4(x-5)= y=(x+4)(x-5)
and
y=3x-15
y=3(x-5)
but i don't know what to do from there, i would appreciate the help
Click here to see answer by dabanfield(803) |
Question 290395: 3x+y+5z=1
4x-2y+3z=8
x+5y-z=-9
Please help solve systems of equations without use of matrix help of a calculator. I need to be able to show work for this. I really need some help with these. I appreciate any help that is given. Thanks.
Click here to see answer by richwmiller(17219) |
Question 290300: Solve the following systems of equations by graphing: y=5x-7, y-5x=8
A.(3,2)
B.(0.5,1.5)
C.(1.5,0.5)
D.no solution
It's not clear to me on how to work these problems. I don't have a graphing calculator, nor do I know how to use one, and neither do I have any graphing paper.
Thank you so, so much for all of your help!!!!
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 290780: A garden supply store sells two types of lawn mowers. Total sales of mowers for the year were $8379.70. The total number of mowers sold was 30. The small mower costs $249.99. The large mower costs $329.99. Find the number sold of each type of mower.
Click here to see answer by richwmiller(17219) |
Question 290780: A garden supply store sells two types of lawn mowers. Total sales of mowers for the year were $8379.70. The total number of mowers sold was 30. The small mower costs $249.99. The large mower costs $329.99. Find the number sold of each type of mower.
Click here to see answer by gsmani_iyer(201)  |
Question 298160: It takes a plane 20 hours to fly to its destination against the wind. The return trip takes 16 hours. If the plane’s average speed in still air is 500 miles per hour, what is the average speed of the wind during the flight?
Click here to see answer by amoati(11) |
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