X²+6x+8=0
x²+2*3x+9-1=0
(x+3)²-1=0
(x+3)²-1²=0
(x+3-1)(x+3+1)=0
(x+2)(x+4)=0
x₁=-2
x₂=-4
Answer: x₁=-2, x₂=-4
Answer:
If light passes in an angle to a surface with a particular refractive index it refracts. This change in direction is due to a change in velocity. As light , for example, travels from air through water, it slows down, allowing it to continue travelling at a different angle or direction.
Step-by-step explanation:
Answer:
40 barrels
Step-by-step explanation:
Given that:
Let x = number of minutes
Old conveyor line :
Filling rate = 3 barrels per minute
Already filled = 10 barrels
Equation :
10 + 3x - - - (1)
NEW conveyor line:
Filling rate = 4 barrels per minute
Equation :
4x - - - (2)
Equate equation (1) and (2)
10 + 3x = 4x
10 = 4x - 3x
10 = x
Hence, in 10 minutes, each line will have filmed same number of barrels which is
4x = 4*10 = 40 barrels
10 + 3x = 10 + 3(10) = 40 barrels
Answer: 76 kg
Step-by-step explanation:
Question wants to know what their total weight is.
Paul weighs 36kg.
Felix weighs half as much as Paul which means that Felix weighs:
= 36 / 2
= 18 kg
Frank weighs 4 kg more than Felix and Felix weighs 18kg. Frank therefore weighs:
=18 + 4
= 22 kg
Their total weight is therefore:
= 36 + 18 + 22
= 76 kg
Answer:
6 ≤x<∞
Step-by-step explanation:
The inside of the square root must be greater than or equal to zero
x-6≥0
x-6+6≥0+6
x≥6
6 ≤x<∞
