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TiliK225 [7]
3 years ago
10

Greg has decreased his running time by 1/10 minute each of the last six weeks. Write an expression to represent the total change

in his time over the last six weeks. Then, find the total change.
Mathematics
2 answers:
Nastasia [14]3 years ago
7 0

x is your starting running time. 1/10 of a minute is 6 seconds, so you can do x - 6(6). 6 times 6 = 36, so your answer is x - 36 seconds. 36 seconds.

Zarrin [17]3 years ago
7 0

Answer:

Total change = <em>x </em>- 36 seconds.

Step-by-step explanation:

Let Greg's initial running time be <em>x </em>seconds.

Also, 1/10 minute = 6 seconds.

In the first week, his running time = <em>x </em>- 6

In the second week, his running time = <em>x </em>- 6 - 6 = <em>x </em>- 2(6)

In the third week, his running time = <em>x </em>- 6 - 6 - 6 = <em>x </em>- 3(6)

....

....

In the sixth week, his running time = <em>x </em>- 6(6) = <em>x </em>- 36

Hence, the total change = <em>x </em>- 36.

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