What is the 20th term in the linear sequence 15, 7, -1, -9, -17

Hello from MrBillDoesMath!

-137

Discussion:

It appears the 8 is subtracted from each term in the sequcnes as we proceed from left to right. The equation describing the nth terms is therefore:

a(n) = 15 - 8 * (n-1)

          a(1) = 15 - 8(0) = 15

          a(2) = 15 - 8*(2-1)   = 15 - 8 = 7

          a(3) = 15 - 8(3-1)  = 15 - 8(2) = 15 - 16  = -1

          etc

The 20th term is given by

a(20) = 15 - 8(20-1)

         = 15 - 8 * 19

         = 15 - 152

         = -137

Thank you,

MrB

x -

median = 1.25

range = 12-14.5

interquartile = q12-q14.5

y -

median = 1

range = 15-17

interquartile = q15-q17

1. x> -5

2. x< 8

step-by-step explanation:

1. 2x> -10

divide by 2 from both sides of equation.

2x/2> -10/2

simplify, to find the answer.

-10/2=-5

x> -5 is the correct answer.

2. 3x< 24

divide by 3 from both sides of equation.

3x/3< 24/3

simplify, to find the answer.

24/3=8

x< 8 is the correct answer.

i hope this you, and have a wonderful day!