What is the product (y+3)(y^2-3y+9)

y^3 + 3^3

Step-by-step explanation:

1) Multiply each term of (y^2-3y+9) by y:  y^3 - 3y^2 + 9y

2) Multiply each term of (y^2-3y+9) by 3:  3y^2 - 9y + 27

3) Add all of these terms together:  y^3 + 27 = y^3 + 3^3

Note:  this is an example of 'special products and factoring.'

2.   2 3/5.

3.   2 1/2.

step-by-step explanation:

6 - 3 2/5

= 6 -   17/5

= 30/5 - 17/5

= 13/5

= 2 3/5 (answer).

5 1/4 - 2 3/4

= 21/4 - 11/4

= 10/4

= 2 1/2 (answer).