Explain how to use a number line to find the opposites of the integers 3 units away from -7

A number line is a way of solving a given equation using a line. So we need to find the opposite of the integers 3 units away from -7 .
Let’s simplify the give numbers first
=> opposite of the integers 3 = -3
=> away = subtract
=> -7
Thus, the equation would be like this
=> -3 – (-7)
=> 4
Pls. see attachment.

16x^2+9

Step-by-step explanation:

Use the FOIL method

(3x3)=9

(3)(-4x)=(-12x)

(4x)(3)=12x

(4x)(-4x)=(-16x^2)

-16x^2-12x+12x+9

Combine like terms

-16x^2+9