Step-by-step explanation:
Correction:
1⟩
Given equation is x²-3x = 4
⇛ x²-3x -4 = 0
⇛ x²+x-4x-4 = 0
⇛ x(x+1)-4(x+1) = 0
⇛ (x+1)(x-4) = 0
⇛ x+1 = 0 or x-4 = 0
⇛ x = -1 or x = 4
2.⟩
Given equation is x²+4x+4 = 0
⇛ x²+2x+2x+4 = 0
⇛ x(x+2)+2(x+2) = 0
⇛ (x+2)(x+2) = 0
⇛ x+2 = 0
⇛ x = -2
Answer:idk
Step-by-step explanation:
idk
Answer:
D) 1980 to 2000
Step-by-step explanation:
Finding the average rate of change in each interval to determine the greatest one.
Production per interval
1950-1960 = = 10 million
1960-1970 = = 20 million
1970-1980 = = 30 million
1980-2000 = million
Rate of change (1950-1960)=
Rate of change (1960-1970) =
Rate of change (1970-1980)=
Rate of change (1980-2000)=
∴ rate of change between 1980 to 2000 is 126.78%
Answer:
(-2,-4)
Step-by-step explanation:
3x-2y=2---eqn1
5x-5y=10---eqn2
multiply eqn1 by 5 and eqn2 by 2
5(3x-2y=2)
2(5x-5y=10)
15x-10y=10---eqn3
10x-10y=20---eqn4
Now subtract eqn4 from eqn3
5x=-10
x=-2
Plug x=-2 into eqn1
3(-2)-2y=2
-6-2y=2
-6-2=2y
-8=2y
y=-4
Therefore the answer is (-2,-4)