Question

Riley is training to run in a 5-kilometer road race. She would like to

reduce her race time by 15 seconds each month that she trains.
The race is in 3 months. What is the total change in time that Riley
hopes to achieve?
1. What integer represents the change in race time Riley wants to
achieve each month?

2. What integer represents the number of months she will train?

3. Write a multiplication expression that can be used to find the total
change in time.

4. Complete the number line to find the product.

Answer 1

Kindly check explanation

Explanation:

Given that :

Objective is to compete in a 5km road race ;

Reduction in race tone per month = 15 seconds

Rqce comes up in 3 months

Total change in race time he hopes to achieve :

1. What integer represents the change in race time Riley wants to achieve each month ; 15 seconds

2. What integer represents the number of months she will train?

She will train for 3 months ; 3 months

Write a multiplication expression that can be used to find the total change in time.

Change in race time * number of month she will train

15 seconds * 3 months = 45 seconds

Let initial race time = (t)

t - 15(month in which race comes up).

t - (15-3) = t - 45