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Tutors Answer Your Questions about Linear-systems (FREE)
Question 134719: This is the equation 4x+3Y=12. The instructor picked the three coordinates
a. X is 0, Y is 4 - I understand the equation for this
b. X is 3 and Y is ) Do not understand how the equation was solved with the Y being 0?
c. X is 4 and Y is -1.33 or -4/3 . Again how was the equation solved to get this coordinate
Thank you
Click here to see answer by vleith(1977)   |
Question 134719: This is the equation 4x+3Y=12. The instructor picked the three coordinates
a. X is 0, Y is 4 - I understand the equation for this
b. X is 3 and Y is ) Do not understand how the equation was solved with the Y being 0?
c. X is 4 and Y is -1.33 or -4/3 . Again how was the equation solved to get this coordinate
Thank you
Click here to see answer by josmiceli(3008) |
Question 134936This question is from textbook algebra 2
: Could you please help with the following problem. It needs to be solved using the elimination method. The answer that I calculated is not what the book shows. Thanks.
x^2+y^2=16
4x^2-9y^2=36
The answer must be in square root format (different form what the book asks for)This question is from textbook algebra 2
Click here to see answer by vleith(1977) |
Question 135392This question is from textbook Essentials of Elementary Algebra
: Solving Systems of Linear Equations by the Substitution Method.
I am having a difficult time understanding how to do this. I was hoping someone could help me.
The problem is: 2x+3y=7
x=2
So would it be 2(2)+3(y)=7? How do I get y?
4+3y=7 I would think that y would equal 1 since 3*1=3+4 would equal 7
However, I am not sure if this is the way the problem needs to be worked out.
Will you please help me understand this? Thank you!This question is from textbook Essentials of Elementary Algebra
Click here to see answer by stanbon(26274) |
Question 136567: How do I go about solving this? The answer is yes but I don't know why. Please help. Thank You very much:)
Determine whether the given point is in the solution set to the given system.
(-3, -1, 4)
2x-2y-3z=-16
4x-3y+3z=3
x+y-5z=-24
Click here to see answer by stanbon(26274) |
Question 136872: Two foods, I and II contain the following percentages of carbohydrates, protein, and fat:
Food Carbohydrates Protein Fat
I 40% 50% 6%
II 60% 20% 4%
Food I costs 3c. per gram, and food II costs 4c per gram. Determine the amount of each that should be served to produce at leat 10 grams of carbohydrates, 7.5 grams of protein, and 1.2 grams of fat, if cost is to be minimized.
Let x=amount of food I
Y=amount of food II
minimize z=0.03x + 0.04y, subject to 0.4x+0.6y=10
0.5x +0.2y=7.5
0.06x+0.04y=12
x=0, y=0
How should I draw this and add this formula in excel?
Click here to see answer by stanbon(26274) |
Question 136911: Please help! It looked easy to solve but I've been at it for fifty minutes and my solutions are not anywhere near (0,1). Can someone please help me? Thank You:)
Solve the system.
y=3^x
y=5^x
Thanks again!
Click here to see answer by dolly(163) |
Question 137256: Could someone help me understand how to solve the problem posted...especially how the variable or unknown will be removed from the denominator. Any help would be greatly appreciated.
Question:
Solve the following system:
5/3a - 7 = -2/5b
7/6a - 1/10b = 3
Click here to see answer by stanbon(26274) |
Question 137275: Could you please solve this system by the addition method, indicating if the system is independent, inconsistent, or dependent.
I really appreciate your help. Thank you very much.
-3x + y = 3
2x - 3y = 5
Click here to see answer by oscargut(682)  |
Question 137270This question is from textbook
: Could you please solve by using sustitution method. Please show details.
Thank you.
x - y = 3
x=3+y
Now substitute x value of 3+y into the below equation
3x - 2y = 3
3(3+y)-2y=3
9+3y-2y=3
9+y=3 subtract 9 to each side
y=3-9
y=-6
x-y=3
x=3+y
x=3+(-6)
x=-3
This question is from textbook
Click here to see answer by tns_tutor5000(9) |
Question 137267: write the equation for:
on a canoe trip, Rita paddled upstream (against the current) at an average speed of 2 mi/h relative to the riverbank. On the return trip downstream (with the current), her average speed was 3 mi/h. Find Rita's paddling speed in still water and the speed of the river's current.
Click here to see answer by ankor@dixie-net.com(6693)  |
Question 137276This question is from textbook
: Please help and solve this system by the addition method and indicate if the problem is independent, inconsistent or dependent. Thank you.
x + 3 (y - 1) = 11
2(x - y) + 8y = 28
Thank you very much. This question is from textbook
Click here to see answer by Fombitz(2113)  |
Question 137272This question is from textbook
: Could you please solve by using sustitution method. Please show details.
Thank you.
x - y = 3
3x - 2y = 3
Also please tell if it is independent, inconsistent or dependent.This question is from textbook
Click here to see answer by Fombitz(2113) |
Question 137404This question is from textbook
: Tutor could you please assist and solve this by the substitution method?
3y = x + 5
3x - 9y = -10
I do so very much appreciate your help.
Thank you.This question is from textbook
Click here to see answer by ptaylor(1578)  |
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