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ch4aika [34]
3 years ago
10

Help please, thank you.

Mathematics
1 answer:
aivan3 [116]3 years ago
8 0

Answer:

B

Step-by-step explanation:

It's not a function because the X's repeat

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Which one?!!! Help plz
nydimaria [60]
I think number 6 it should be right I think
4 0
3 years ago
Is x+y+1=0 a tangent of both y^2=4x and x^2=4y parabolas?
Lubov Fominskaja [6]

Answer:

  yes

Step-by-step explanation:

The line intersects each parabola in one point, so is tangent to both.

__

For the first parabola, the point of intersection is ...

  y^2 = 4(-y-1)

  y^2 +4y +4 = 0

  (y+2)^2 = 0

  y = -2 . . . . . . . . one solution only

  x = -(-2)-1 = 1

The point of intersection is (1, -2).

__

For the second parabola, the equation is the same, but with x and y interchanged:

  x^2 = 4(-x-1)

  (x +2)^2 = 0

  x = -2, y = 1 . . . . . one point of intersection only

___

If the line is not parallel to the axis of symmetry, it is tangent if there is only one point of intersection. Here the line x+y+1=0 is tangent to both y^2=4x and x^2=4y.

_____

Another way to consider this is to look at the two parabolas as mirror images of each other across the line y=x. The given line is perpendicular to that line of reflection, so if it is tangent to one parabola, it is tangent to both.

7 0
3 years ago
Given 3x + y =17 and x+3y = -1 find the value of 3x + 3y
Phoenix [80]
3x+y=17
=> 3x=17-y
Again, x+3y=-1
=> 3y= -1-x
now, 3x+3y= (17-y)+(-1-x)
                  = 17-y-1-x
                  = 16-x-y 
5 0
3 years ago
Read 2 more answers
What is the square root of 9
GalinKa [24]
3 is the answer. 3 X 3 = 9
I'm glad I could help
7 0
3 years ago
I need help with these two questions please:) I need the answers fast ! Please and Thank You
Valentin [98]

Answer:

#1 is 9 times 10^15

#2 is 3 times 10^8

Step-by-step explanation:

4 0
3 years ago
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