I need the answers really quick before my time is out HELP PLZZ
3. determine which ordered pair is a solution of y = 2x – 3?
A.(-2,7)
B.(0,3)
c.(-4,-11)
d.(5,-7)
4.on which of the following lines does (7,1) lie?
A. y-5x=4
b. y=x-10
c. y=-4x+3
D. y=-x=8
6.find the slope of the line through (6,2) and (4,-2)
A.0
b. half
c. unidentified
D. 2
here are my answer of what I think
1.d
4.c
6.b
3.
Answer c
Becouse :
For x = - 4
y = 2 x – 3 = 2 * ( - 4 ) - 3 = - 8 - 3 = - 11
4.
Answer d
If your expression mean y = - x + 8
6.
m = ( y2 - y1 ) / ( x2 - x1 )
In this case :
x1 = 6 , x2 = 4 , y1 = 2 , y2 = - 2
m = ( y2 - y1 ) / ( x2 - x1 ) = ( - 2 - 2 ) / ( 4 - 6 ) = - 4 / - 2 = 2
Answer d.
tnx so much :)
Sure! Let's break down how to find the answers to each of these questions:
3. To determine which ordered pair is a solution of y = 2x - 3, you need to substitute the x and y values from each given choice into the equation and see if the equation holds true. Let's go through each option:
A. (-2,7)
Substituting x = -2 and y = 7 into the equation:
7 = 2(-2) - 3
7 = -4 - 3
7 = -7 (Not true)
B. (0,3)
Substituting x = 0 and y = 3 into the equation:
3 = 2(0) - 3
3 = -3 (Not true)
C. (-4,-11)
Substituting x = -4 and y = -11 into the equation:
-11 = 2(-4) - 3
-11 = -8 - 3
-11 = -11 (True)
D. (5,-7)
Substituting x = 5 and y = -7 into the equation:
-7 = 2(5) - 3
-7 = 10 - 3
-7 = 7 (Not true)
Therefore, the solution is C. (-4,-11).
4. To determine on which line the point (7,1) lies, you need to substitute the x and y values of the point into each equation and see if the equation holds true. Let's go through each option:
A. y - 5x = 4
Substituting x = 7 and y = 1 into the equation:
1 - 5(7) = 4
1 - 35 = 4
-34 = 4 (Not true)
B. y = x - 10
Substituting x = 7 and y = 1 into the equation:
1 = 7 - 10
1 = -3 (Not true)
C. y = -4x + 3
Substituting x = 7 and y = 1 into the equation:
1 = -4(7) + 3
1 = -28 + 3
1 = -25 (Not true)
D. y = -x + 8
Substituting x = 7 and y = 1 into the equation:
1 = -7 + 8
1 = 1 (True)
Therefore, the point (7,1) lies on the line described by the equation: y = -x + 8 (option D).
6. To find the slope of the line through (6,2) and (4,-2), you can use the formula for slope:
slope = (change in y) / (change in x).
Let's calculate the slope:
change in y = -2 - 2 = -4
change in x = 4 - 6 = -2
slope = (-4) / (-2) = 2
Therefore, the slope of the line through (6,2) and (4,-2) is 2 (option D).
I hope this helps you! If you have any further questions, feel free to ask.