Question

why no one is answering me:/

Answer 1

i give up? why

Answer 2

why?

Answer 3

Join the club

Answer 4

oh i thought it was a riddle

Answer 5

LMAO @satellite73

Answer 6

what is the question? if it is not geometry, i will try my best

Answer 7

Sure people will answer if your question is answerable. If nobody is answering, try bumping the post. But getting frustrated is not going to help. I can also try to help.

Answer 8

the first three terms of sequence are -2,4, & -8. if each subsequent term is the product of the preceding term how many of the first 90 terms are negative? @satellite73

Answer 9

i would say every other one, i.e. half

Answer 10

half of 90 i mean

Answer 11

exactly but any formula tha is using here?? of airthematic progression or geometric series?? @satellite73

Answer 12

common sense
it is not arithmetic or geometric,

Answer 13

it might be every other 2
-,+,-,-,+,-,-,+,-,-,+,...

Answer 14

after the first one that is

Answer 15

oh really?

Answer 16

its from that chapter but

Answer 17

-2,4,-8,-32,oh maybe you are right!

Answer 18

go with @freckles i messed up again

Answer 19

so whats the answer?

Answer 20

so we have 90 terms
lets look at -,+,-,-,+,-,-,+,-,-,+,-,-,+,....

1,1,2,1,2,1,2,1,2,1,2,...

so maybe we need to solve x(1)+y(2)=90
y is the number of negative and x is the number of positives
we need another equation though

Answer 21

x and y have to be integers of course

Answer 22

we have 1 more 1's than we have 2's it looks like

Answer 23

because the first two terms our 1,1

Answer 24

how they are 1?

Answer 25

what do you mean?

Answer 26

first two terms are not 1

Answer 27

we have the sequence: -,+,-,-,+,-,-,+,-,-,+,...
I was counting
1,1,2,1,2,1,2,1,...
and actually I think my equation is not 1(x)+2(y)=90
because not all of 1's represent a positive

Answer 28

just the first 1 doesn't represent a positive

Answer 29

so the answer must be??

Answer 30

@freckles

Answer 31

so....

Answer 32

i think i'm wrong

Answer 33

because we already did the 2 to 1 thing when we 1(x)+2(y)=90

Answer 34

I actually kinda stuck

Answer 35

but i think you aren't here anymore so i give up too

Answer 36

do you have ideas rose
like I think it something closed to this x+y=90
y=2x

Answer 37

if you solve that system you will get pretty close if not the the right answer

Answer 38

like we know we want the sum of the no. negs and no. pos =90
since we have 90 terms
and we also know there is a 2 to 1 ratio that is where I get y=2x

Answer 39

so I would substitute y=2x into x+y=90
solve x+2x=90 for x
and then enter into y=2x
but i think you are going to have to end up adding 1 to that y since we had one of the 1's correspond to a negative

Answer 40

@satellite73 what do you think

Answer 41

i gave up on this an hour ago

Answer 42

i think formula will be used here

Answer 43

i would say two thirds are negative and one third are positive

Answer 44

60 30 in other words

Answer 45

the optiions are
45
30
16

Answer 46

for how many are negative @rosebird ?

Answer 47

those are the options?

Answer 48

it may be the half of 90

Answer 49

yeh options

Answer 50

the first three terms of sequence are -2,4, & -8. if each subsequent term is the product of the preceding terms how many of the first 90 terms are negative?
I thought this meant
-2,4,-8,-32,256,...
so you will have -,+,-,-,+,-,-,+,-,-,...
There should be more than half of 90

Answer 51

the first three terms of sequence are -2,4, & -8. if each subsequent term is the product of the preceding term how many of the first 90 terms are negative?
it says the preceding term is product so it must be 4 than -32...

Answer 52

yeh exactly @freckles

Answer 53

+, - , - , + , - , - , +, -, -, +...i think two thirds are negative

Answer 54

but it is late and i am dumb

Answer 55

-2,4,-8,16,-32,64,-512,256..............

Answer 56

\[\frac{2}{3}(89)+1 \approx 2 (29.6)+1 \approx 2 (30)+1=60+1 =61 \]
which is what we would also get with my equations
x+y=90
y=2x
3x=90
x=30
y=2x=2(30)=60
and then I said to add 1 because of the addition -
y=61 and that would make x=29

Answer 57

approx 29 (it could be 30) would be the number of positive
approx 61 (it could actually be 60) would be the number of negatives

Answer 58

is this an online thing?

Answer 59

thats easy then

Answer 60

none of these

Answer 61

we have way many negatives than the choices they have provided

Answer 62

it cant be none

Answer 63

why

Answer 64

none of the other options make sense

Answer 65

it is definitely somewhere close to 60 for the number of negatives
none of those are close to 60