Question

at mr vid's video rentals you can join his Vid Club for monthly membership fee of $30.Club members pay only $.85 to rent each movie. If you are not a member of the Vid CLub,the movies rent for $2.25 each.How many videos would you have to rent each month to make a membership worth the investment?

Answer 1

i got the equation

30+.85x=2.25x is this the right thing to do to solve

Answer 2

@ganeshie8

Answer 3

@mathmate

Answer 4

@ganeshie8

Answer 5

@e.mccormick

Answer 6

@SolomonZelman

Answer 7

@TheSmartOne

Answer 8

@tester97

Answer 9

Great question.

\(\large\color{slate}{ 0.85x+30~~~~~~~~\le~~~~~~~~2.25x }\)
\(\lfloor ~~~~~~~~~~~~~~~~~\rfloor\) \(\lfloor ~~~~~~~~~~~\rfloor\)

\(\large\color{slate}{ \Uparrow }\) \(\large\color{slate}{ \Uparrow }\)
the cost for movie the cost for each movie
with the membership. without the membership.
(x is the number of movies) (x is the number of movies)

Answer 10

Hope this helps.

Answer 11

(the floor brackets are just to point, they aren't a floor function or anything of that sort. )

Answer 12

@SolomonZelman could my equation work too. i put 30+.85x=2.25x

Answer 13

well, you can't buy a half of a movie can you?

Answer 14

there might not be a natural number x that satisfies your equation.

Answer 15

so i cant use it then, so i dont understand your equation

Answer 16

like how im i suppose to solve it

Answer 17

wait, first off... do you understand what my equation is actually saying?

Answer 18

well the sign means greater or equal too, rit?

Answer 19

@SolomonZelman

Answer 20

yes.
Saying that `0.85x+30` (i.e. the cost per x number of movies w/ membership) is greater than `2.25x` (i.e. the cost per number of movies x without membership).

Answer 21

I mean is less than (in second line of my comment, instead of "is greater than" )

Answer 22

ok how would i solve it to find x

Answer 23

\(\large\color{slate}{ \displaystyle0.85x+30\le2.25x }\)

subtract 0.85x from both sides.
what do you get?

Answer 24

subtracting x from both sides will be -1.4 rit?

Answer 25

you are subtract 0.85x from both sides, not just x.

Answer 26

subtracting**

Answer 27

\(\large\color{slate}{ 0.85x+30 \le2.25x}\)

\(\large\color{slate}{ 0.85x+30 \color{red}{-0.85x}\le2.25x\color{red}{-0.85x} }\)

Answer 28

see how I subtracted from both sides?

Answer 29

yes is -1.4 rit

Answer 30

I do not understand you, please say what you are trying to say correctly.

Answer 31

2.25x minus -0.85x = -1.4

Answer 32

do u still not understand

Answer 33

??????????????? @SolomonZelman

Answer 34

that is off, retry please.

Answer 35

3.1

Answer 36

@SolomonZelman

Answer 37

you are leaving terms out. It seems to me as though that you don't have a proper knowledge to solve this problem. Or your x's disappear for no known reason, or the -1.4 , what is -1.4, where is it from?

I just don't really get what you are doing, that is how wrong it is.

Please don't take my words offensively, but it seems like you need to review more,

Answer 38

i do have the knowledge to solve this problem u said subtract the 0.85x from both sides and thats what i did and got 3.1x @SolomonZelman

Answer 39

@ganeshie8

Answer 40

\(\large\color{black}{ \displaystyle 0.85x+30\color{red}{-0.85x}\le2.25x-0.85x }\)

Answer 41

At first, what happens on the left side, do you see anything cancel?