I might be able to answer the question if I can see the graphs.
Answer:
A
Step-by-step explanation:
Plug in the values of each of the coordinate pairs into the linear system.
2x - 8y = 0, -3x - 8y = 20
A)
2*-4 - 8*-1 = 0
- 8 - (-8) = 0 -> CORRECT!
-3x - 8y = 20
-3*-4 - 8*-1 = 20
12 - (-8) = 20 -> CORRECT!
You don't need to try any other pairs, you already know that this is the solution to the problem! Remember, in the future, just plug all the coordinate pairs into the equation. Whichever one makes the equation true is the correct solution! Hope this helps!
Answer:
8
Step-by-step explanation:
2n - 4 < 3n - 6
2n < 3n - 2
-n < - 2
n > 2
The answer would be D
Step-by-step explanation:
a). x²+2x+1=0
x = -1 , - 1
Therefore the roots are real.
b). x²+4=0
x²= -4
x = 2 , -2
Therefore the roots are real.
c) 9x²-4x-14 =0
x =
=
=
=
x =
= -1.48
x =
= 1.04
Therefore, x = 1.04 , -1.48
Hence the roots are real
d) 8x²+4x+32=0
x =
=
=
=
x =
= -2.2
x =
= 1.73
Therefore, x = 1.73 , -2.2
Hence the roots are real