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OpenStudy (uh60blackhawk):
give us the question
OpenStudy (anonymous):
Which expression describes the rule of this sequence?
Three, six, nine, twelve, fifteen, eighteen, and so on.
three plus the quantity n minus one
three times n
three plus the quantity three times n
three plus n
OpenStudy (uh60blackhawk):
3,6,9,12,15,18 so what do you think
OpenStudy (anonymous):
Times 3x ?
OpenStudy (uh60blackhawk):
its going up by what
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OpenStudy (uh60blackhawk):
well if 3*3= 9 that will be incorrect
OpenStudy (anonymous):
A?
OpenStudy (uh60blackhawk):
3+3=6-1=5 that will be incorrect too.
OpenStudy (anonymous):
Okay. I see it now B
OpenStudy (uh60blackhawk):
no that was your first pick
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OpenStudy (anonymous):
D is the only answer left .
OpenStudy (uh60blackhawk):
yes that will be correct
OpenStudy (uh60blackhawk):
3+3= 6
6+3=9
9+3=12 and so on
OpenStudy (anonymous):
Aha, I see now.
OpenStudy (anonymous):
Okay, The next one, I think it is C
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OpenStudy (anonymous):
Which expression describes the rule of this sequence?
7, 14, 21, 28, 35…
7 + n
7n
7n
n+ 7 + 7
OpenStudy (uh60blackhawk):
what will you think
OpenStudy (anonymous):
C
OpenStudy (uh60blackhawk):
7n mean 7*n
OpenStudy (anonymous):
Yes, C right?
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OpenStudy (uh60blackhawk):
no whats 7*7?
OpenStudy (anonymous):
49
OpenStudy (uh60blackhawk):
so is there 49 in your question?
OpenStudy (uh60blackhawk):
7, 14, 21, 28, 35 there is not 49 in here
OpenStudy (anonymous):
yass. it's not there.
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OpenStudy (uh60blackhawk):
so that will be incorrect
OpenStudy (anonymous):
D looks correct to me.
OpenStudy (uh60blackhawk):
7+7+7=?
OpenStudy (anonymous):
21
OpenStudy (anonymous):
21 is in there!
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OpenStudy (uh60blackhawk):
so is there a 21 after 7? 7, 14, 21, 28, 35
OpenStudy (anonymous):
Yass !
OpenStudy (uh60blackhawk):
no look again 21 is before 14
OpenStudy (uh60blackhawk):
you guessed all the answer except one
OpenStudy (anonymous):
It looks like it's D. A, B and C doesn't make any sense
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OpenStudy (uh60blackhawk):
we have to find the expression that goes with 7, 14, 21, 28, 35 and the sequence have to be in order.
OpenStudy (anonymous):
It looks like it would be B
OpenStudy (uh60blackhawk):
again 7*7=49 there is no 49 in the sequence
OpenStudy (anonymous):
Then a
OpenStudy (uh60blackhawk):
yes it will be A you know what?
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OpenStudy (uh60blackhawk):
*why
OpenStudy (anonymous):
cuz' its continuing on with x3
OpenStudy (uh60blackhawk):
no because 7+7= 14 and 14+7=21
OpenStudy (anonymous):
Simplify by combining like terms.
eight b plus two c plus three minus four b plus five c
four b plus seven c plus three
twelve b plus seven c plus three
four b minus three c plus three
twelve b minus three c plus three
OpenStudy (uh60blackhawk):
sorry i don't know that one
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