Tutors Answer Your Questions about Linear-systems (FREE)
Question 668441: Hello my name is Sarah I was here yesterday and you guys did me a big favor!! but now all I have is 5 more problems. {y=5x 6x-2y=-4 {4x-y=5 x=8-2y {-7x+y=32 2x+3y=27 {2x+y=5 4x-3y=-10 {4x+2y=7 x-5y=10 can i have it y tonight? thanks (:
Click here to see answer by ewatrrr(24785)   |
Question 668441: Hello my name is Sarah I was here yesterday and you guys did me a big favor!! but now all I have is 5 more problems. {y=5x 6x-2y=-4 {4x-y=5 x=8-2y {-7x+y=32 2x+3y=27 {2x+y=5 4x-3y=-10 {4x+2y=7 x-5y=10 can i have it y tonight? thanks (:
Click here to see answer by lynnlo(4176) |
Question 668524: Please help, this one stumps me. Thank you to anyone willing to give it a shot.
One apple has 100 calories and 24 grams of carbohydrates. One avocado has 350 calories and 14 grams of carbohydrates. How many of each should be eaten to get exactly 1000 calories and 100 grams of carbohydrates?
Click here to see answer by Alan3354(69443)  |
Question 668524: Please help, this one stumps me. Thank you to anyone willing to give it a shot.
One apple has 100 calories and 24 grams of carbohydrates. One avocado has 350 calories and 14 grams of carbohydrates. How many of each should be eaten to get exactly 1000 calories and 100 grams of carbohydrates?
Click here to see answer by MathTherapy(10552)  |
Question 668204: If Ben gives Abe four dollars, Abe will have three times as many dollars as Ben. If Abe gives Ben four dollars, they will have the same amount. How many dollars does each have?
Write a linear system of two equations.
Solve the system by addition or substitution.
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 668715: after selling a total of 427 adult and student tickets the cashier at a theater had receipts of $3263.50 if adult tickets sells for $8.50 and student tickets for 6.50 how many of each type of ticket were sold?
Click here to see answer by mananth(16946)  |
Question 669124: The expensive ones cost $7 each, whereas the worthless ones sold for only $2 each. You spent $111 and bought three more expensive ones than worthless ones. How many did you buy.
I know it is a system of equations: 7Ne + 2Nw = 111 is the first equation, don't know what the second equation is?
Click here to see answer by ReadingBoosters(3246) |
Question 669150: Which of the following statements is true about the given system of linear equations?
–x + y = 4
3x + y = 32
1.The system has a unique solution.
2.The system has infinitely many solutions.
3.The system has no solution.
4.The system has two solutions.
Click here to see answer by mananth(16946) |
Question 669907: A tugboat goes 100 miles upstream in 10 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current.
The speed of the tugboat is__mph, and the speed of the current is__mph.
Click here to see answer by mananth(16946) |
Question 670860: You are making a large triangular pennant for your school football team. The vertices of the triangle are (0,0), (0,50), and (70,20) where the coordinates are measured in inches. How many square feet of material will you need to make the pennant?
Click here to see answer by Alan3354(69443) |
Question 670879: I'm not sure if I'm in the right place but here it goes. I can't seem to figure out this problem. You have to solve for 3 variable and you're given 3 equations, but I can't solve it. The problem is:
x + y + z = 0
2x + 3y + 2z = -1
x - y + z = 2
Click here to see answer by Alan3354(69443) |
Question 670879: I'm not sure if I'm in the right place but here it goes. I can't seem to figure out this problem. You have to solve for 3 variable and you're given 3 equations, but I can't solve it. The problem is:
x + y + z = 0
2x + 3y + 2z = -1
x - y + z = 2
Click here to see answer by lynnlo(4176) |
Question 670879: I'm not sure if I'm in the right place but here it goes. I can't seem to figure out this problem. You have to solve for 3 variable and you're given 3 equations, but I can't solve it. The problem is:
x + y + z = 0
2x + 3y + 2z = -1
x - y + z = 2
Click here to see answer by vleith(2983) |
Question 672213: The problem states, "Solve the system of equations using substitution method".
This is what I did so far...
x=3y -- equation 1
9x - 3y=12 -- equation 2
Step 1: Substitute x in equation 2 and solve
9x - 3y=12; x=3y
9(3y) - 3y=12
27y - 3y=12
24y=12
24y/24=12/24
y=1/2
Step 2: Substitute y in equation 1 and solve
x=3y
x=3/1(1/2)
x=3/2
Now, according to the answer key in my textbook, it states that there is no solution and that the lines are parallel. As you can see above, I somehow came up with a solution of (3/2, 1/2). Substituting (3/2, 1/2) into the original equations made them true (equal), not false (unequal). Please tell me where I went wrong with this problem.
Click here to see answer by MathTherapy(10552) |
Question 672717: 1) Use the method of substitution to solve the system of linear equations
3x-y=5
7x-2y=15
2) use the method of substitution to solve lineear equations
3a=2-b
3a=7-b
3)Solve the system of linear equations
3x-y=0
2x-y=1
Click here to see answer by MathLover1(20850)  |
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