Question
Jane walks one mile from her house to her grandparents’ house. Then
she returns home, walking with her grandfather. Her return rate is 70% of her normal walking rate. Let r represent her normal walking rate.
a. Write an expression for the amount of time Jane spends walking.
b. Simplify your expression.
she returns home, walking with her grandfather. Her return rate is 70% of her normal walking rate. Let r represent her normal walking rate.
a. Write an expression for the amount of time Jane spends walking.
b. Simplify your expression.
Answers
since time = distance / speed,
t =1/r + 1/.70r = 1.70/.70r = 2.43/r or 17 / 7r
t =1/r + 1/.70r = 1.70/.70r = 2.43/r or 17 / 7r
How did it add up to 1.7/.7r?