Find the three arithmetic means between 7 and 21.

Arithmetic mean of 7 , 21
(7 + 21) /2   = 14

Arithmetic mean of 7 and 14
(7+ 14) /2   = 10.5

Arithmetic mean of 14 and 21
(21 + 14)/2 =17.5

so, the three arithmetic means would be : 10.5 , 14 , and 17.5

hope this helps

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o