Quick math help
Can someone please check my math Hw? Thank you!!
Solve each system by elimination.
1. 8x+7y=1
9x7y=2
I got (1,1)
2. 4x+3y=1
4x7y=13
I got (2,2)
3. 7x6y=21
x6y=3
I got (3,0)
4. 2x+3y=16
2x5y=16
I got (8,0)
5. 7x+2y=13
14x+4=26
I got (0,0)
6. 15x8y=14
5x+9y=8
I got (2,2)
7. x6y=22
2x+3y=1
I got (8,5)
8. 2x+10y=30
10x6y=18
I got (0,3)
9. 35x15y=0
56x+24y=0
I got (0,0)
10. 56x+72y=16
49x+63y=14
I need help with this one!!!

You do not need us to check.
Put your answers back in the original equations.
as for #10
56x+72y=16
49x+63y=14
divide top by 2
divide second by 7
7 x + 9 y = 2
7 x + 9 y = 2
NO solution. This is the same line repeated, no intersection
In linear algebra if one row is identical to or a multiple of another, the determinant of the coefficient matrix is zero and the solution is undefined.posted by Damon

Can you check number 5? Is it no solution?
posted by Anonymous
Respond to this Question
Similar Questions

algebra
I just need a quick check before I hand in my work if you would...Thanks. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and 6 for x I got these as my ordered pairs to graph (3, 1), 
Math
Please help! x2y+z=7 2x+yz=0 3x+2y2z=2 a. Solve the above system of equations using Gaussian Elimination or GaussJordan Elimination. You must show row operations. b. Solve the above system of equations using Cramer's Rule. 
Math
Use the method of elimination to solve the following system of equations. You must check your answer: 1)x/2 + y/5 = 1/2 2) 3x  y = 8 
Math 116 algebra please check
Solve by the elimination method 3r7s=28 7r+3s=70 What is the solution of the system r=7 and s=7 
Math Homework
Hello! I need help with these math questions, thanks! :) 1.) Solve the system by substitution. 5x + 2y = 17 x = 3y 2.) Solve the system by substitution. x/3 + y = 4/3 x + 2y = 11 3.) Solve the system by elimination. 2x  3y = 0 
Math Check
Hi! Can someone check my answers? Thanks! Directions: Solve each system by using the elimination method. Make sure to write your answer in (x,y) form. 1.) 3x5y=2 2x+5y=13 2.) 3x+11y=4 2x5y=9 My answers: 1.) (3,7/5) 2.) (17,5) 
Math
Use elimination to solve each system of equations. x+y2z=10 8x9yz=5 3x+4y+2z=10 I need to figure out what x,y, and z each equal. I must use the elimination method. 
Discrete Math
I am really stuck on these problems. I've worked a lot of them but I can't get these. Sometimes I think I know the answer but I can't show how I got it. 1.) Solve each matrix equation for X. 2X + 5A = B 2.) Find the following 
math
Please solve the system with the elimination method. Explain each step as it is performed. 5y = x 2x  3y = 7 Would the elimination method have been your first choice to solve this problem? 
algebra
i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y  1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of