Question

Lily buys a $425 TV and pays $31.88 in tax. If she also buys a $200 DVD recorder, how much additional tax will she pay?

Answer 1

Okay first let's find out how much tax she pays:
$425->100%
$31.88->x%

Answer 2

x = 31.88*100/425=3188/425=7.5

Answer 3

So she pays 7.5% tax. Now do the following:
200 - 100%
x - 7.5%

Answer 4

x = 200*7.5/100 = 2*7.5 = 15

Answer 5

She has to pay $15 more

Answer 6

wow you did that fast!

Answer 7

thanks!

Answer 8

I'm a superhero after all haha =)

Answer 9

i have another one I cant figure out

Answer 10

Post it as a new thread, this gets slow if it gets long

Answer 11

The local community theater has fixed expenses of $1500 per week. The theater sells about 150 tickets to a play each week when it charges $20 per ticket. When it charges $14 per ticket, about 210 tickets are sold. Write the equation that relates ticket price and number of tickets sold, and use it to predict how many tickets they should expect to sell if they change the ticket price to $9.50.

Answer 12

thats the one I have posted

Answer 13

hmmmm will have to think about this

Answer 14

you want to go to the question so I can give you credit?

Answer 15

no ill just do it here

Answer 16

cool

Answer 17

dang this is a tough one..

Answer 18

i thought so too

Answer 19

20*150=3000 hmm

Answer 20

14*210=2940.. these are just random thoughts

Answer 21

dang lol this is making me feel bad..

Answer 22

why?

Answer 23

because I am having trouble solving it..

Answer 24

do u have the answer to it btw?

Answer 25

i have been on this problem for like 3 hours

Answer 26

no its for my class

Answer 27

i was thinking 9.5 * 270=2565

Answer 28

I was thinking:
20 - 150
9.5 - x
x = 9.5*150/20 = 71.25

Answer 29

looks good to me

Answer 30

but then:
14-210
9.5-x
x=142.5

Answer 31

that doesn't make any sense

Answer 32

arghhhh

Answer 33

I guess u will have to hang around for our brilliant minds to show up. Those include:
joemath(bunch of numbers at the end)
amistre
satellite
alchemista
myininaya
and imranmeah91

Answer 34

this is my last problem...i am stummped

Answer 35

Sorry I have to write my own speech right now (for a class), but if this is due on monday or something, i can take a look at the problem later tonight and see if i can solve it.

Answer 36

so the equation would look like this?
9.50*x=t

Answer 37

this is due today

Answer 38

actually give me like 15 minutes..

Answer 39

ok

Answer 40

what is your speech on?

Answer 41

Bernard Baruch, anyway working on this problem. This looks simple, like logic, there's actually like a lot more info given than necessary which makes it harder..

Answer 42

i agree

Answer 43

can u check the answer if i give it to you? like is this an internet assignment that will say wrong if u enter the wrong answer?

Answer 44

yes

Answer 45

YAY! I think i got it.

Answer 46

actuall I am taking collage math on line

Answer 47

how many trials do u get?

Answer 48

not by choice

Answer 49

but i have a site where I can check answers

Answer 50

i just need to find the equation

Answer 51

yea im tryin..

Answer 52

i came up with this but not sure how to apply it
Simplifying
x * 9.5 = b

Reorder the terms for easier multiplication:
9.5x = b

Solving
9.5x = b

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '9.5'.
x = 0.1052631579b

Answer 53

this 2nd one is throwing me off.. their revenue is not constant, it's either 3000 or 2940

Answer 54

my brain is mush... I will just do 9.5*270=2565

Answer 55

Wait isn't this like a line?

Answer 56

f(20)=150
f(14)=210

Answer 57

now you lost me

Answer 58

It is a line. The 'fixed expenses' part doesn't seem relevant. You are given two points and asked to find the line that relates them

Answer 59

how do we do that

Answer 60

Yes exactly Bahrom.

Answer 61

oh okay working on it

Answer 62

Let:
y=150, x = 20
y1 = 210, x1 = 14

Answer 63

You have two points (14,210) and (20,150). Plug them into the slope formula to find the slope of the line. Then use the slope and one of your points in the point-slope formula for a line.

Answer 64

Slope of that line is:
M = (y-y1)/(x-x1) = (150-210)/(20-14) = -60/6=-10

Answer 65

Once you have the equation for the line, you'll want to plug in 9.5 for x and see what your y value is to find the number of tickets sold.

Answer 66

y-y1 = M(x-x1)
y-210=-10(x-14)
y = -10x + 140 + 210
y = -10x +350

Answer 67

That's the equation where y is the # of tickets and x is the price.

Answer 68

So when price is 9.5
y = -10*9.5+350 = -95+350=350-95=255

Answer 69

So the amount of tickets they would sell if the price was 9.5 would be 255
and the equation would be:
y = -10x+350, where y is the # of tickets and x is the price.

Answer 70

Check the answer, and thanks Polpak!

Answer 71

great job all thanks for all your help bahrom! good luck on your speech!

Answer 72

lol np =)

Answer 73

it makes sence to me now!