identity used is
x³ + y³+ z³– 3xyz = (x + y + z) (x² + y² + z² – xy – yz – zx).
then use
(x+y+z)² = x²+y²+z²+2(xy+yz+xz)
225= 83 + 2(xy+yz+xz)
xy+yz+xz = (225-83)/2
xy+yz+xz= 142/2
xy+yz+xz= 71
ok
now use identity
x³ + y³+ z³– 3xyz = (x + y + z) (x² + y² + z² – xy – yz – zx).
now
x³ + y³+ z³– 3xyz = 15 (83 – xy – yz – zx).
= 15[83 - (71)]
= 15×12
=180
Find the gradient/slope of Line A:
(3-2)÷(-1-4)
=-0.2
Therefore, the gradient/slope of line B is 5
Using the equation y-y1=m(x-x1) we can find the equation of line B
y-7=5(x-3)
y= 5x-8
Sub in a random value for y (eg. y=2)
2=5x-8
5x=10
X=2
so (2,2)
5- 12 centimeters is equal to 0.12 m:
the last one is true
6-
the second one is true
Answer:
2 or 1
Step-by-step explanation:
2 + 4 × 2 = 10
1 + 4 × 1 = 5
<span>the nth root of a quantity is the same as the quantity raised to the 1/nth power
so a square root is the same as raising to the 1/2 power
a cube root is the same as raising to the 1/3 power
option D is right hope this helps</span>
