Every morning, Sasha exercises for 20 minutes. She exercises for \( k \) minutes every evening. Next week, she will double her exercise time at night. Write an algebraic expression to show how long Sasha will exercise each day next week.
Answer (2)
If k=20 minutes Each day Sasha will exercise 2 times more. 2 times more than k is 2k. So first week Sasha will exercise k+2k+3k+4k+5k+6k=20+40+60+80+100+120=440 minutes The formula to show how long Sasha will exercise each day next week is: 440 + 20*x where 440 is initial exercise time, and x is number of day in next week.
Sasha's total exercise time each day next week can be represented by the expression 20 + 2 k minutes, where k is the time she currently exercises in the evening. This reflects her daily morning routine of 20 minutes plus double her evening exercise time. By using this expression, you can easily calculate her total exercise time for any value of k .
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