How do the signs of
factors attect their product?

Step-by-step explanation:

If the factors have the same sign, the product will be positive, and if the factors have opposite signs, the product will be negative.

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!