Question

Write a formula for this sequence: 19, 11, 3, -5,...

Answer 1

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

Answer 2

It would be x-8...

Answer 3

witch one? A. 27 - 8n
B. -8n + 19
C. -5 + 8n

Answer 4

If n starts at 1 and increases, then the answer is A. If n starts at 0 and increases, then the answer is B. I believe the answer you are looking for is A, since most sequences go from n=1 to n=inf

Answer 5

thankyou

Answer 6

np

Answer 7

Find the 7th term in this sequence:
tn=8.5n-30
A. -21.5
B. 29.5
C. 4
D. 38

Answer 8

Since you want the 7th term, you should substitute 7 into n, and that would give you 8.5(7)-30=59.5-30=29.5.
Your answer would be B. 29.5.

Answer 9

The easiest way to approach this problem is to note that the you can generally put the term number into the equation. In this case, 8.5*7-30=29.5.

Answer 10

thanks sooo much guys!

Answer 11

Write a formula for this sequence. 50, 83, 116, 149,...

A. 33n + 50
B. 33n + 17
C. 149 - 33n

Answer 12

So, begin with the first answer. Note that for A, if you put in term n=1, you get 83. This is not the first term, so A is wrong. For B, if you put in term n=1, you get 50. That is the first term, so B could be correct. Now note that each term increases by 33, so B is probably the right answer. Now check C. If you put in n=1, you get 116, which is not the first term. So B is the answer.

Answer 13

omg u explained it way better then the review did :) thx!

Answer 14

Find the slope for the table of values below.

x 1 2 3 4
y 8.5 11 13.5 16

A. 2.5
B. 4
C. 1
D. 8.5

Answer 15

confused

Answer 16

So the easiest way to find the slope is to know that rise/run is equal to the slope. Since the change in y is the rise and the change in x is the run, we can determine the slope from the table. The change in y is 2.5, because the numbers increase by 2.5 every time x increases by 1. The change in x is 1. So, the slope would be change in y/change in x, which is 2.5/1 or 2.5.
A

Answer 17

thankyou!

Answer 18

Find the equation for the table.

x 1 2 3 4
y 8.5 11 13.5 16

this would be the same rule right??

Answer 19

Well now you know the slope. If you are familiar with the general equation y=mx+b, you can see that m stands for slope. We solved for slope in the previous example, so we just need b which is the y intercept.

Answer 20

Yes, this would be the same rule for finding the slope.

Answer 21

ok i understand that one.... but i dont get this one Predict the y-value for x = 6.

x 1 2 3 4
y 8.5 11 13.5 16

A. 19.5
B. 21
C. 23.5
D. 26

Answer 22

Ok so to predict the y-value, you just have to extrapolate. Note that every time x increases by 1, y increases by 2.5. So if you keep adding 2.5 to y and extend the table, you'll reach x=6.

Answer 23

so what would the answer be?

Answer 24

So if you add 1 to x to make it x=5, then you have to add 2.5 to y to make it y=18.5. Now add 1 to x to make it x=6, and add 2.5 to y to make it y=21. So when x=6, y=21.

Answer 25

ooooooooh

Answer 26

Is the following sequence arithmetic? 11, 15, 19, 23,...

A. yes
B. no