2. Jane walks one mile from her house to her grandparents' house. Then she returns home,

walking with her grandfather. Her return rate is 75% of her rate walking alone. Let R represent

her rate walking alone

a. Write an expression for the amount of time Jane spends walking.

b. Simplify your expression

c. Suppose Jane's rate walking alone is 4mi/h. About how much time does she spend

walking?

a)

b)

c) 0.583hr or 35 minutes

Step-by-step explanation:

Distance covered by Jane = 1 mile

Let her rate walking alone be r

Return rate = 75% of r

a) Let's find the time spent to and fro using the formula:

Time spent going, we have:

d = 1 mile

Speed, v = r

Therefore time spent when going =

Time spend while returning:

d = 1 mile (same distance)

v = 75% of r =

Therefore the time spent while returning =

The amount of time Jane spent walking would be:

b) simplifying the expression, we have:

Let's take the HCF

Let's add the numerator,

Dividing by 25, we have:

The simplified expression is

c) If her walking rate is 4 mi/hr, the amount of time she would spend walking:

From the simplified exoression, let's substitute 4 for r,

Converting 0.583 hour to minutes, we have:

0.583 * 60 mins = 35 minutes

Therefore Jane spent 35 minutes walking

answer: i don't understand. what are the options

step-by-step explanation: