noriega1270
noriega1270 noriega1270
  • 02-09-2018
  • Mathematics
contestada

Q # 15 I need help please to resolve

Q 15 I need help please to resolve class=

Respuesta :

Riia
Riia Riia
  • 03-09-2018

The sequence is

740, 707.60,675.20,642.80,...

Here first term is 740, and common difference, d is

[tex] 707.60-740 = -32.40 [/tex]

Now we use the formula of nth term, which is

[tex] a_{n} = a+(n-1)d [/tex]

Substituting the values of a,n and d, we will get

[tex] =740+(n-1)(-32.40), 23 months [/tex]

Correct option is the second option .

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