1. subtract and simplify
(-y^2-4y--6y+3)

2. multiply and simplify
2x^2y^3z^2*4xy^4x^2

3. multiply and simplify
(x-4) (x^2-5x-6)

Step-by-step explanation:

1-(-y^2-4y-8)-(-4y^2-6y+3)

Simplify: 3y^2+2y−11

Subtract: 3y^2+2y-11

2. 2x^2y^3z^2*4xy^4x^2

Simplify: 8x^5y^7z^2

Subtract: 8x^5y^7z^2

3. (x-4) (x^2-5x-6)

Simplify: x^3-9x^2+14x+24

Subtract: x^3-9x^2+14x+24

step-by-step explanation:

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