The numbers a, b and c satisfy a+b+c = 0 and abc = 78. What is
the value of (a+b)(b+c)(c+a)?​

Step-by-step explanation:

We are given that the numbers a, b and c

  ....(1)

   ..... (2)

We have to find the value of (a+b)(b+c)(c+a).

From equation we get

Substitute the values then we get

Using equation (2) we get

Hence, the value of is -78.

the answer

b. they are parallel and will never intersect.

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers