Question

ONE QUESTION

Answer 1

here, I think to conjecture a linear relationship between x= number of months, and y = number of sunscription, namely:
y=ax+b

Answer 2

so we have to solve the subsequent system:
\[\left\{ \begin{gathered}
5730 = 5a + b \hfill \\
6022 = 7a + b \hfill \\
\end{gathered} \right.\]

Answer 3

where a and b have to be determined, using, for example the substitution method

Answer 4

hint:
I solve the first equation, and I get:
b= 5730-5a

Answer 5

next I substitute that value for b inthe secon equation, as below:
\[6022 = 7a + 5730 - 5a\]

Answer 6

what is a?

Answer 7

one sec im doing it

Answer 8

146

Answer 9

ok!

Answer 10

now I substitutte that value for a into the first equation, for example, and I get:
\[b = 5730 - 5a = 5730 - 5 \times 146 = ...?\]

Answer 11

then what is b?

Answer 12

5730-5a

Answer 13

yes, and a = 146, so:
b = 5730 - 5* 146= 5730 - 730= ...?

Answer 14

5000?

Answer 15

perfect!

Answer 16

so our relationship, is:
\[y = 146x + 5000\]

Answer 17

sorry i confused myself but i understand now

Answer 18

ok!

Answer 19

solve that ^

Answer 20

now, we have to set x= 10 into the previous formula, and then we have to compute y:
\[y = 146x + 5000 = 146 \times 10 + 5000 = ...?\]

Answer 21

what is y?

Answer 22

hint:
\[146 \times 10 + 5000 = 1460 + 5000 = ...?\]

Answer 23

im not sure dude

Answer 24

why?

Answer 25

do i just solve that straight out

Answer 26

where do i start?

Answer 27

in order to answer to your problem, we have to write the right function which models your exercise. Now, I think you are studying the linear relationships, so I have conjectured a linear relationship between the months x and the subscription y. Then your starting point is this function:
y= ax+b

Answer 28

Now, using your data, we have to determine the values of a and b. We got:
a = 146, and b = 5000

Answer 29

finally we have to write how many are the Subscriptions after 10 months. In order to that we have to set x=10 into our formula, namely:
y = 146*10 +5000
what do you get is the right answer to your problem

Answer 30

yes but what i dont get is what do i solve for here ->b = 5730 - 5* 146= 5730 - 730=

Answer 31

there you are finding the value of the coefficient b:
b= 5730-730=5000

Answer 32

so the function which models your problem is:
y = 146x+5000

Answer 33

so for x or y?

Answer 34

i got 146

Answer 35

that's the value of a, furthermore, you have to evaluate y when x=10

Answer 36

dang this one is Hard

Answer 37

oh i se one sec

Answer 38

6460

Answer 39

SO D :)

Answer 40

congrats! you got the right answer