# 9th grade math

posted by .

Which of the linear systems has exactly one solution
A: -x+y=9
x-y=9

B: -x+y=9
x-y= -9

C: -x+y=9
-x-y=9

D: x-y= -9
-x+y= -9

• 9th grade math -

find a system where the slopes are different. ANy two lines with different slopes intersect at exactly one point.

Looks like (C)

• 9th grade math -

|1.5C-24|<=30

## Similar Questions

1. ### 9th grade math (algebra 1)

Fine the solution set of each system of linear equations or inequalities below by graphing. Show all work under the graph of each system. 1. x + y = 3 2x - 2y = 6
2. ### Grade 10 Math

Write an equation that forms a system of equations with x + y = 4, so that the system has: a) No solution b) Infinitely many solutions c) One solution I know how to figure out if two linear systems have a solution, but I don't understand …
3. ### 9th grade math

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9
4. ### 9th grade math

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9
5. ### 9th grade math

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9
6. ### 9th grade math

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9
7. ### 9th grade math

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9
8. ### math

How many solution sets do systems of linear inequalities have?
9. ### Algebra 1A

How many solution sets do systems of linear inequalities have?
10. ### linear systems

for what values of k does the linear system below have: a) infinite solutions?

More Similar Questions