I dont understand the question for D can someone please explain it

Question

asked Jan 25, 2020 199k views

1 Answer

Lazov · Answer 1 · 2020-01-29T11:07:21+0000

Answer:

71°

Explanation:

The average temperature is calculated as

Average =
(sum)/(count)

let x be the temperature in October, then

(25+70+65+85+92+82+x)/(7) = 70, that is

(419+x)/(7) = 70 ( cross- multiply )

419 + x = 490 ( subtract 419 from both sides )

x = 71

Average temperature in October was 71°