Substitution with negative numbers Evaluate 2 – (-4) + (-y) where y = 7. Stuck? Watch a video or use a hint.

-1

Step-by-step explanation:

2 - (-4) + (-y)

plug in 7 as y

2 - (-4) + (-7)

so you start with the first addition/subtraction (PEMDAS)

also the negative is distributed to the -4 make it positive, a negative and a negative equals a positive, therefore positive 4

2 - (-4) = 6

or

2 + 4 = 6

then... the equation reads

6 + (-7) = -1

*becareful -7 is "more than/ more negative than" 6 making the answer a negative

answer: the distance

step-by-step explanation:

to calculate the distance d of a line segment with endpoints (x1, y1) and (x2, y2) use the formula d (x2 x1)2 (y2 y1)2. to calculate the midpoint of a line segment with endpoints (x1, y1) and (x2, y2) use the formula