Answer:
the mean is 4.2
Step-by-step explanation:
x = 3
2x + y - z = 3 → (1)
- x + y + 2z = 0 → (2)
3x + 2y + z = 9 → (3)
we require to eliminate the y and z terms from the equations
(1) + (3) : 5x + 3y = 12 → (4)
multiply (1) by 2
4x +2y - 2z = 6 → (5)
(2) + (5) : 3x + 3y = 6 → (6)
(4) - (6) : 2x = 6 ⇒ x = 3
Answer:
x = 9
Step-by-step explanation:
y = 2/3x - 6
If the y point is 0, then plug that number into the equation and solve for x.
0 = 2/3x - 6
Add 6 to both sides of the equation.
6 + 0 = 2/3x - 6 + 6 or 6 = 2/3x
Multiply both sides by 3.
3 x 6 = 2/3x x 3 or 18 = 2x
Divide both sides by 2
18/2 = 2x / 2 or 9 = x
Answer:
(x+5)(x+4)
Step-by-step explanation:
factors of 20: 1,20,2,10,4,5
Since 4 and 5 are the only factors of 20 that have a sum of 9 the answer is (x+5)(x+4)
Answer:
D. 144
Step-by-step explanation:
find the volume of the shipping container and divide it by the volume of a box.
× 
× 
= 
× × = 
divided by is 144.
