Frank ran 65km on monday, 68km on tuesday, 66km on wednesday, and 80km on thursday. he ran again on friday, then calculated the mean distance run per day to be 70km. how far did frank run on friday?

71

Step-by-step explanation:I think I solve it a weird way but here it is.

70 times 5= 350

65+68+66+80= 279

350-279= 71

Check:

65+68+66+80+71= 350

350/5=70 which means 71 is the correct answer

go hook jvc hgv cj xk jvc 6756

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.