Question

in which story could you use the quotient -12 ÷ -2 to answer the question? while hiking, francesca makes up a game. each time she stumbles on a root, she loses 2 points. each time she jumps over a rock, she earns 3 points. when she reaches the top of the trail, she has 20 points. as she heads down the trail, she stumbles multiple times but never jumps over any rocks. her final score is 8. how many times did francesca stumble on her way down? while hiking, francesca makes up a game. each time she stumbles on a root, she loses 2 points. each time she jumps over a rock, she earns 3 points. when she reaches the top of the trail, she has 20 points. as she heads down the trail, she stumbles multiple times but never jumps over any rocks. her final score is 12. how many times did francesca stumble on her way down?

Explanation:

Step1: Calculate point - loss for first story

Initial points at top of trail are 20 and final score is 8. Point - loss is \(20 - 8=12\). Since she loses 2 points per stumble, number of stumbles is \(\frac{12}{2}\), which can be written as \(- 12\div - 2\).

Step2: Calculate point - loss for second story

Initial points at top of trail are 20 and final score is 12. Point - loss is \(20 - 12 = 8\). Number of stumbles is \(\frac{8}{2}\), not \(-12\div - 2\).

Answer:

The first story.