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Andrea runs 4 miles every day, but she wants to increase her distance in order to run a 26 mile marathon. She decides to add 2 miles each day to her distance until she achieves her goal. If she starts with 6 miles today, how many miles will she have run in total, by the time she achieves her 26 mile goal? The correct answer is 176 miles.

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    Lv 7
    1 month ago

     Andrea runs 4 miles every day, but she wants to increase her distance

     in order to run a 26 mile marathon.

     She decides to add 2 miles each day to her distance until she achieves her goal.

     If she starts with 6 miles today, how many miles will she have run in total,

     by the time she achieves her 26 mile goal?

     6 + 8 + 10 + 12 + 14 + 16 + 18 + ... + 26

     sum_(n=1)^11 2 (n + 2) = 176 miles

     The correct answer is 176 miles.

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