1. The scale shows x + 3 = 7. To get x by itself on the left, what do you do? 1 pt Add 3 to both sides Add 3 to both sides Subtract 3 from both sides Subtract 3 from both sides Subtract 3 from the left side only Subtract 3 from the left side only Divide both sides by 3 Divide both sides by 3
2. Why must you do the same thing to both pans? 1 pt So the scale stays balanced So the scale stays balanced Because x is on the left pan Because x is on the left pan Because the right pan is heavier Because the right pan is heavier You do not have to You do not have to
3. Remove 3 weights from the left pan and 3 weights from the right pan. The scale balances with x alone. What is x? 1 pt Answer:
4. Select every move that keeps the scale balanced. 2 pts Add 2 weights to both pans Add 2 weights to both pans Remove 2 weights from the left pan only Remove 2 weights from the left pan only Remove 2 weights from both pans Remove 2 weights from both pans Add 5 weights to the right pan only Add 5 weights to the right pan only
7. Switch to Inequality mode. The banner shows x + 3 > 7. What is the boundary value of x, the value where the two sides are equal? 1 pt 3 3 4 4 7 7 10 10
11. To solve 4x = 12, what single step isolates x? 1 pt Subtract 4 from both sides Subtract 4 from both sides Divide both sides by 4 Divide both sides by 4 Divide both sides by 12 Divide both sides by 12 Add 4 to both sides Add 4 to both sides