Question

4
elena walked 20 minutes more than lin. jada walked twice as long as elena. jada walked for 90 minutes. the equation ( 2(x + 20) = 90 ) describes this situation. match each expression with the part of the story it represents.
a. ( x )
b. ( x + 20 )
c. ( 2(x + 20) )
d. 90

1. the number of minutes that jada walked
2. the number of minutes that elena walked
3. the number of minutes that lin walked

Explanation:

Step1: Define variable for Lin's time

Let $x$ = minutes Lin walked.

Step2: Find Elena's walk time

Elena walked 20 mins more than Lin: $x + 20$

Step3: Find Jada's walk time

Jada walked twice Elena's time: $2(x + 20)$, which equals 90.

Step4: Match expressions to descriptions

1. Jada's time = $2(x+20)$ or 90; 2. Elena's time = $x+20$; 3. Lin's time = $x$

Answer:

1. D. 90, C. $2(x + 20)$
2. B. $x + 20$
3. A. $x$