40 POINTS
Show your work and solve this using the process of elimination.

Elimination process doesn't work. (Because of the )

Step-by-step explanation:

Firt, lets have both equations equal to 7.

y = -x + 7

y =

Multiply by -1 to the top equation so that we can cancel out the y's when adding the two equations together.

-y = x - 7

Now, we add the two equations together.

0 =

To find x, we have to use the factor.

It seems to be that you can't factor, so this system of equations can't be solved using the elimination process. (Can be solved using substitution)

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

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.