bewellplus.gsu.edu
allie32 allie32
  • 29-03-2016
  • Mathematics
Answered

when Sally picks any number between 1 and 20, doubles it, adds 6, divides by 2 and subtracts 3, she always gets the number she started with. why?

Verified Answer :

growl
growl growl
  • 29-03-2016

I think it might be because 2 and 3 are factors of 6.

Answer Link
apologiabiology
apologiabiology apologiabiology
  • 29-03-2016

lets say number is x

doubles it (2x)
adds 6 (2x+6)
divide it by 2 (2x+6=2(x+3) so 2(x+3) divided by 2=x+3)
subtract 3 (x+3-3=x)

becasue math is fun, brah

Answer Link

Related Questions

Can a rectangle with the perimeter as 46 cm have an area of 48 cm
Carly just rented an apartment she will need to sign and date her lease which of the following is not a correct way for her to write out the date
What is the sum of 9c83c
What do followers of animism believeone should give to the poor all natural things have spirits ancestors should be respected history should be passed down usin
Write a phrase for s 7
Underwater vs Outer Space Exploration
During which phase of the cell cycle are DNA and centrioles of animal cells replicated
divide 72Kg in the ratio of 1 3 5
Remainder in 804 divided by 7
as a citizen what do you agree to do