Algebra

5) How many solutions does the system of equations have?x-4y=12 and 5x-20y=60
A.one
B.two
C.infinitely many
D.none
6) How many solutions does the system of equations have? y-6x=-3 and 4y-24x=-16
A.one
B.two
C.infinitely many
D.none

1. 5) Multiply first equation by 5.

5x - 20y = 60

6) Multiply first equation by 4.

4y - 24x = -12

Subtracting first equation from the second, what does that tell you?

posted by PsyDAG
2. what is the answer for 5 and 6
A.one
B.two
C.infinitely many
D. none

posted by Victoria
3. I need help can someone help me.

posted by Victoria
4. come on. For #5, you have

5x-20y=60
5x-20y=60
They are the same equation. So, any solution to one is also a solution to the other.

Try a similar comparison for #6 and just think about what it means.

posted by Steve
5. thank you so much. thanks

posted by Victoria

Similar Questions

1. Math

1. How many solutions does the system of equations have 3x=-12y+15 and x+4y=5 a. one b. two c. infinitely many*** d. none 2. How many solutions does the system of equations have y=6x+2 and 3y-18x=12 a. one b. two c. infinitely
2. Math

1.How many solutions does the system of equations have? y=6x+2 y=6x+4 a. one b. two c. infinite d. none 2. How many solutions does the system of equations have? y=1/2x-3 x-2y=6 a. one b. two c. infinitely many d. none 3. How many
3. Linear Algebra

I need help please!! How many solutions does the system of equations have? 2x=-10y+6 and x+5y=3 a. one b. two c. infinitely many d. none y=4x+3 and y=4x+4 a. one b. two c. infinitely many d. none x-4y=12 and y=1/4x-3 a. one b. two
4. Algbra

How many solutions does the system of equations have? -2x=-10y+6; x+5y=3 1 2 infinitely many none y=4x+3; 2y-8x=3 1 2 infinitely many none y-7x=-14; 7y-49x=-2 1 2 infinitely many none
5. Algebra

Suppose a linear system of equations has 2012 equations and 2013 unknowns. Answer the following questions:  Can the system be inconsistent?  Can the system have a unique solution?  Can the system have infinitely many solutions?
6. algebra

5x=7+4y 20x-16y=28 how many solutions are there for the system of equations? Infinitely many solutions No solution. two solutions or three solutions?
7. Maths

The equations x+ ky + 2z =0 x + (2k-1)y + 3z =0 x + ky + (k+3)z = 2k-1 Find the values of k such that a) the system has a unique solution b) the system has no solutions c) the system has infinitely many solutions Thanks
8. math

The equations x+ ky + 2z =0 x + (2k-1)y + 3z =0 x + ky + (k+3)z = 2k-1 Find the values of k such that a) the system has a unique solution b) the system has no solutions c) the system has infinitely many solutions THANKS
9. Algebra 2 Helpp :(

QUESTIONS (vvv) (1) Solve the system by subsitution 2x + y = -11 3 - 4y = 11 (2) Solve the system by elimination 2x + 6 = -12 5x - 5y = 10 (3) What is the solution of the following system? -3x - 2y = -12 9x + 6y = -9 (4) What is
10. Algebra

How many solutions does this system of equations have? y = 4x + 3 and 2y - 8x = 3 One, two, infinitely many, or no solutions? My answer is no solutions.

More Similar Questions