I think 21 or 22 not sure
Answer:
(1,-4)
Step-by-step explanation:
x = -b/2a
a = 2
b = -4
x = 4/4
x = 1
Then substitute x = 1 into the equation to find y
y = 2(1)^2 - 4(1) - 2
y = -4
So, (1,-4)
Answer:
Step-by-step explanation:
_________
Multiply: 2*1= 2
Add 2 to both sides:
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1st , 3rd and last option is correct
Answer:
Solution is given by (-2,-1)
Step-by-step explanation:
2x-3y = -1
11x-9y = -13
Multiplying equation 1 by -3 and adding it to equation 2 ,we get
-6x+9y = 3
11x -9y = -13
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5x = -10
gives x = -2
plugging this value in equation (1) ,we get
2(-2) -3y = -1
-4 -3y =-1
-3y =-1+4
-3y =3
y = -1
solution is (-2,-1)
