saufykhan saufykhan
  • 03-08-2019
  • Mathematics
contestada

Complete the series
90,85,75,55..???
a)20.
b) 25
C)15
D) 5 explain it plZzz answer is 25 but how???

Respuesta :

znk
znk znk
  • 03-08-2019

Answer:

[tex]\boxed{\text{C) 15}}[/tex]

Step-by-step explanation:

Let's examine the differences between consecutive terms

[tex]\begin{array}{cc}\textbf{Term} & \textbf{Diff.} \\90 & \\& 5 \\85 & \\& 10 \\75 & \\& 20 \\55 & \\& \mathbf{40} \\\mathbf{15} & \\\end{array}\\\text{The difference doubles with each consecutive term.}\\\text{If the pattern continues, the next term will decrease by 40.}\\\text{The next term in the series will be $\boxed{\mathbf{15}}$.}[/tex]

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