6x + 8y = -22 and Ox + y = -5 *

one solution : (-9 ; 4)

Step-by-step explanation:

hello :

the system is : 6x + 8y = -22 (*)

                       x + y = -5 (**)

by (**)    y= - x -5

put this value in (*) :  6x+8(-x-5)=-22

6x-8x-40 = -22

-2x=18

x= 18/-2

x= -9

put this value in (**) : -9+y=-5

y=4

one solution : (-9 ; 4)

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

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