you and some friends are going to a museum. Each ticket costs $4.50.
a. if n is the number of tickets purchased, write an expression that gives the total cost of buying n tickets

- anonymous

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- anonymous

word problem help

- ccswims

are they asking you to create your own equation?

- anonymous

yeah for A.

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## More answers

- anonymous

i got f(n)=4.5n

- ccswims

yea, your right, lol. ^.^

- anonymous

can you help me with this one?

- Ineedhelpfast12

4.5n

- anonymous

b) Suppose the total cost for n tickets is $36. What is the total cost if one more ticket is
purchased?

- ccswims

ok, now just plug in 36 for f(x)

- Ineedhelpfast12

36+4.50

- ccswims

no

- ccswims

36 = 4.5n

- anonymous

ok thanks

- anonymous

thanks for being helpful. mind if you help me with other ones? @ccswims

- ccswims

sure!

- anonymous

is 20-2*3^2

- anonymous

does it equal 2?

- ccswims

yes :)

- anonymous

can you show me step by step how to do it

- ccswims

ok, use PEMDAS, or order of operations.
Parenthesis
Exponents
Multiply
Divide
Add
Subtract
that is the order you go through things if you have a problem you just showed me

- ccswims

since we have no parenthesis, but we do have exponents, we would simplify the exponent first

- anonymous

ok

- ccswims

that would leave us with 20 - 2*9 now

- ccswims

then we have multiplication, so we do 2*9 next

- ccswims

and then subtract 20 - 18 last

- anonymous

ok thx

- anonymous

5*2^2 / 2+8 = 18 right?

- ccswims

yes

- anonymous

if s=4 and t=8 what is (st)^2 / (st^2)

- anonymous

@ccswims

- ccswims

ok, so according to PEMDAS parenthesis always comes first

- ccswims

so with that information, what can you do by yourself?

- anonymous

how is the equation set up?

- ccswims

(4*2)^2 / (4*2^2)

- ccswims

WAIT

- ccswims

(4*8)^2 / (4*8^2)

- ccswims

for some reason i put 2 instead of 8 in the first expression i gave you

- anonymous

oh

- ccswims

so work on (4*8)^2 / (4*8^2) and then tell me your answer when you get it

- anonymous

1?

- anonymous

@ccswims

- ccswims

not quite.
when you multiply 4*8 you get 32
32^2 / (4*8^2)
now, the (4*8^2) part can get tricky because i used to think you need to multiply 4*8 first then use the exponent. but what that parenthesis tells us is that its actually 4 * 8^2 and the 8 is the only one with the exponent.
so its actually 32^2/256

- ccswims

then its 1024/256 = 4

- ccswims

so the answer is 4

- anonymous

can you help me with a few more plz

- ccswims

yea sure

- ccswims

do you get the problem tho?

- ccswims

like, do you understand how i got 4?

- anonymous

yeah i saw my mistake

- ccswims

ok, as long as you understand how to do it :)

- anonymous

ok so if s=4 and t=8 what is 2s^2-t^3 / 16

- anonymous

just tell me the set up and ill try to get it

- ccswims

ok, you you need to plus in 4 for s and 8 for t
2*4^2 - 8^3 / 16

- anonymous

ok

- anonymous

i messed up i think @ccswims

- anonymous

i got 0

- ccswims

the answer is actually 1, can you show me your work so i can see where you went wrong?

- anonymous

ok

- ccswims

WAIT, never mind you got it right

- ccswims

i messed up and divided 32 by 32, and you need to subtract 32 and 32

- ccswims

which im guessing you did because the answer is 0 and you got 0.

- anonymous

2*4^2-8^3 / 16
2*16-512 / 16
32-512 / 16
32-32

- ccswims

yes, you got it right

- ccswims

it was my mistake. your getting the hang of equations like this really well

- anonymous

so is it 1 or 0?

- ccswims

it is 0, you were right :)

- anonymous

hay!!!!!!! lol

- anonymous

thx. can you help me with 4 more?

- ccswims

yes :)

- anonymous

dang im invisible lmfao

- ccswims

lol nah i see you

- anonymous

YAY :D

- anonymous

i can help

- anonymous

ok

- anonymous

here is the next one

- anonymous

just screenshot it

- anonymous

\[2[(8-4)^{5} \div 8]\]
\[22+1^{3}+(3^{4}-7^{2})\]
____________________________
2^3

- anonymous

i have no clue

- anonymous

i cant screenshot it its paper

- anonymous

this problem is confusing

- ccswims

are they 2 different problems?

- anonymous

is that all one problem?

- anonymous

yeah one problem

- anonymous

i can skip it if u want

- anonymous

no no

- anonymous

well the top part is 256

- anonymous

ops its only the top one! ha lol

- ccswims

yea, just remember what we talked about in the beginning, PEMDAS, use your order of operations

- anonymous

the one that starts with 2?

- anonymous

yeah

- anonymous

the answer is 256

- ccswims

and the bottom one is a fraction right?

- anonymous

i dont need to do the bottom

- anonymous

okie :P

- anonymous

so how do i do this?

- anonymous

8-4=?

- ccswims

wait, i got 704?

- anonymous

4

- anonymous

4^5

- anonymous

i know the answer is 256 because my teacher gave me the answer to this one but he wants me to do the work

- anonymous

im showing u how

- anonymous

ok so parentheses first?

- anonymous

so far we have|dw:1439253355452:dw|

- anonymous

then|dw:1439253413305:dw|

- anonymous

then what

- anonymous

@ccswims

- anonymous

i dont know what to do

- anonymous

|dw:1439253625948:dw|

- anonymous

thats 128

- anonymous

ok so what is the absolute value of 128?

- anonymous

i dont know

- anonymous

128

- anonymous

oh 256

- ccswims

multiply use your order of operations

- anonymous

absolute value is the number but positive

- anonymous

ok i need help with 3 more

- anonymous

so if you have the absolute value of -128 you would get 128

- anonymous

i meant 2 more

- anonymous

we didnt finish the steps :S

- anonymous

3m^2-n; m=2, n=6

- anonymous

@ccswims

- anonymous

never mind i got it its 6

- anonymous

ok thank you guys for helping so much. i need to go bye

- anonymous

bye

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