1. -1 + 2

2. 1 + (-2)

3. -1 - 2
-
4. 1 - (-2)

What is the best estimate of the length of a football

On which number line are -3 and its opposite shown

Solve the following system algebraically. y = x2 – 9x + 18 y = x – 3 a. (3,1) and (5,3) b. (3,0) and ( 4,2) c. (–4,5) and (7,–10) d. (7,4) and (3,0)