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word problem help

are they asking you to create your own equation?

yeah for A.

i got f(n)=4.5n

yea, your right, lol. ^.^

can you help me with this one?

4.5n

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

36+4.50

no

36 = 4.5n

ok thanks

sure!

is 20-2*3^2

does it equal 2?

yes :)

can you show me step by step how to do it

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

ok

that would leave us with 20 - 2*9 now

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

and then subtract 20 - 18 last

ok thx

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

yes

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

ok, so according to PEMDAS parenthesis always comes first

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

how is the equation set up?

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

WAIT

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

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

oh

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

1?

then its 1024/256 = 4

so the answer is 4

can you help me with a few more plz

yea sure

do you get the problem tho?

like, do you understand how i got 4?

yeah i saw my mistake

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

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

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

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

ok

i got 0

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

ok

WAIT, never mind you got it right

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

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

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

yes, you got it right

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

so is it 1 or 0?

it is 0, you were right :)

hay!!!!!!! lol

thx. can you help me with 4 more?

yes :)

dang im invisible lmfao

lol nah i see you

YAY :D

i can help

ok

here is the next one

just screenshot it

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

i have no clue

i cant screenshot it its paper

this problem is confusing

are they 2 different problems?

is that all one problem?

yeah one problem

i can skip it if u want

no no

well the top part is 256

ops its only the top one! ha lol

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

the one that starts with 2?

yeah

the answer is 256

and the bottom one is a fraction right?

i dont need to do the bottom

okie :P

so how do i do this?

8-4=?

wait, i got 704?

4^5

im showing u how

ok so parentheses first?

so far we have|dw:1439253355452:dw|

then|dw:1439253413305:dw|

then what

i dont know what to do

|dw:1439253625948:dw|

thats 128

ok so what is the absolute value of 128?

i dont know

128

oh 256

multiply use your order of operations

absolute value is the number but positive

ok i need help with 3 more

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

i meant 2 more

we didnt finish the steps :S

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

never mind i got it its 6

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

bye