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DerKrebs [107]
2 years ago
6

Brandy set her watch 4 seconds behind and it falls behind another 1 second every day. How many days had it been since brandy las

t set her watch if the watch is 22 seconds behind?
Mathematics
2 answers:
kari74 [83]2 years ago
5 0

Answer:

18 days

Step-by-step explanation:

Let x represent number of days.

We have been given that Brandy's watch falls 1 second every day. So Brandy's watch will fall 1x seconds behind in x days.

We are also told that Brandy set her watch 4 seconds behind, so Brady's watch will be behind by total x+4 seconds in x days.

Since Brady's watch is 22 seconds behind, so we will equate x+4 by 22 to solve for x as:

x+4=22

x+4-4=22-4

x=18

Therefore, Brandy set her watch 18 days ago.

xenn [34]2 years ago
3 0

Answer:

Its been 19 days since brandy last set her watch as the watch is 22 seconds behind.      

Step-by-step explanation:

We are given the following in the question:

Brandy set her watch 4 seconds behind and it falls behind another 1 second every day.

Thus, this forms an arithmetic progression.

4, 5, 6, 7, ...

First term, a = 4

Common difference, d = 1

The n^{th} terms is 22. We have to find the value of n.

The  n^{th} terms of A.P is given by

a_n = a + (n-1)d

Putting values, we get,

22 = 4 + (n-1)1\\18 = n-1\\n = 19

Thus, its been 19 days since brandy last set her watch as the watch is 22 seconds behind.

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