Answer: No. Quincy should have used the trend line to find the corresponding x value when y=80.
2x -3y = 13
4x -y = -9
Multiply the second equation by -3 to make the coefficient of Y opposite the first equation.
4x -y = -9 x -3 = -12x + 3y = 27
Now add this to the first equation:
2x -12x = -10x
-3y +3y = 0
13 +27 = 40
Now you have :
-10x = 40
Divide each side by -10:
x = 40 / -10
x = -4
Now you have a value for x, replace that into the first equation and solve for y:
2(-4) - 3y = 13
-8 - 3y = 13
Add 8 to both sides:
-3y = 21
Divide both sides by -3:
y = 21/-3
y = -7
Now you have X = -4 and y = -7
(-4,-7)
We do not know the answer because their is no problem
Answer: B
Step-by-step explanation: The answer would be B because both the 8x and 22x are both negative so once you add those two together you would get -30x so that cancels out A and C. SO now you move onto 23 and 9 well both of those are positive so you would add those together and get 32 so that cancels out D and only answer left is B
Answer:
GH=5
HI=5
IJ=5
JK=9
Step-by-step explanation:
GK=24
HJ=10
GH=HI=IJ.
Let GH, HI, IJ be x
therefore,
HI+IJ=10
=>x+x=10
=>2x=10
=>x=10/2
=>x=5
HI=IJ=GH=5
GH+HI+IJ+JK=GK
=>5+5+5+JK=24
=>15+JK=24
=>JK=24-15
JK=9