The symbol shown is a ray. A ray has an endpoint and includes all points on a line in only one direction. That is why the symbol above the letters XY has a single arrowhead. Ray XY starts at point X; it includes all points on line XY between X and Y, and also point Y and all points on the line past Y. It does not include any point past X going in the direction from Y to X.
Answer:
The answer is 3 because the sign does not have the equal to line underneath it so its open the number its less than is four and anything less than is open to the left.
Step-by-step explanation:
1)
3x-2y=14
y=5x
So we plug in y=5x into 3x-2y=14
We get:
3x-2(5x)=14
3x -10x=14
-7x=14
x=-2
So we found x, now we need to find y. We can simply plug in x into the equation and get y.
y=5x
y=5(-2)
y=-10
So your answer will be (-2,-10).
2)
x-2y= -2
y= 2x+4
Once again plug in y=2x+4 into x-2y=-2
x-2(2x+4) = -2
x-4x-8=-2
-3x-8=-2
-3x = 6
x= -2
Now we plug back in x and solve for y :)
y=2x+4
y=2(-2)+4
y=-4+4
y=0
So our solution would be (-2,0).
3)
x+2y=-7
x-5y=7
Multiply the second equation by -1
-x+5y=-7
Now add that equation with the other one:
x+2y=-7
+
-x+5y=-7
-----------------
7y=-14
y=-2
Now plug in y=-2 and solve for x
x+2y=-7
x+2(-2)=-7
x+(-4)=-7
x-4=-7
x=-3
So your solution would be (-3,-2).
