Choose the correct sum of the polynomials (4x3 − 2x − 9) + (2x3 + 5x + 3).

6x³+3x-6

Step-by-step explanation:

To add the polynomials, combine like terms:

4x³+2x³-2x+5x-9+3

4x³+2x³ = 6x³;

-2x+5x = 3x;

-9+3 = -6

This gives us

6x³+3x-6

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5