Jerry started doing sit-ups every day. the first day he did 13 sit-ups. every day after that he did 2 more sit-ups than he had done the previous day. today jerry did 29 sit-ups. write an equation that could be solved to find the number of days jerry has been doing sit-ups, not counting the first day. let  n  represent the number of days.

an equation that can jerry to find the number of days he has been doing sit-ups is given by

An equation that can help Jerry to find the number of days he has been doing sit-ups is  

Step-by-step explanation:

First day = 13

Second day =  first day + 2 = 13 +2 =15

Third day  =  second day + 2 =  17

Fourth day = Third day +2  = 19

So,

13 , 15 , 17, 19, 21, 23 ...........

The common difference is 2

By using arithmetic series

where

is the number of sit-ups done on the nth day

n is  number of the days

d is the difference

Now

water molecules will move from the side of higher water concentration to the side of lower concentration until both solutions are isotonic. at this point, equilibrium is reached. in an isotonic solution, the flow of water in and out of the cell is happening at the same rate.

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