Question

What is the product of: 16t^3/2t+4 * t+2/8t.

Answer 1

okay thank you. But what did I need to do? Cross multiply or, cancel out.... can u explain

Answer 2

okay, the answer you gave isn't one of my answers

Answer 3

Luis_Rivera, you're close, but you'll have two sets of '2' cancel as well

Answer 4

please help!! I wanna be able to finish this test quick!! I wanna do something else other than Virtual School!!

Answer 5

is t^2?

Answer 6

yeah that's what you'll be left with

Answer 7

yay. can you help me with something else?

Answer 8

ok one more

Answer 9

urgh... I have like a lot more than one... but I'll choose the hardest one for me...

Answer 10

urgh... I have like a lot more than one... but I'll choose the hardest one for me...
What is the sum of\[\frac{8g }{ g^5 } +\frac{ 7-g }{ g^5 }\]

Answer 11

the denominators are the same

so you can add the numerators and place them over the common denominator

Answer 12

umm... what does that mean? i'm not good with math terms.

Answer 13

the denominator is the lower portion of the fraction

Answer 14

the numerator is the upper portion

Answer 15

okay really quick:

Answer 16

if you had 60 = 12t + 10t how would you solve for t?

Answer 17

combine the 12t and the 10t to get _____

Answer 18

22t,

Answer 19

good, so

60 = 22t

Answer 20

then you divide both sides by 22 to isolate t

60/22 = t

Answer 21

make sure you reduce as much as possible

Answer 22

ohhh so, 60/22 Is the fraction since it cant be divided?

Answer 23

well you would reduce to get 30/11

Answer 24

so t = 30/11

Answer 25

umm... I'm not sure that works with my equation... umm... I have 2=2t/5 + 2t/6

Answer 26

ok notice the denominators are 5 and 6

Answer 27

they are not the same, so you cannot add the fractions right away

Answer 28

yes

Answer 29

so you need to find the LCD

Answer 30

i know, i have to find the lcm and then I have to multiply it by the lcm, (or lcd) to both sides, then that's where I think i went wrong.

Answer 31

the LCD is 30

Answer 32

yes, then I got, 60 =

Answer 33

good, what did you get for the right side

Answer 34

60 = 60t/5 + 60t/6

Answer 35

oh yeah, is the first equation, 7/g^4

Answer 36

ok i see how you got 60 = 12t + 10t

Answer 37

the answer to 60 = 12t + 10t is t = 30/11

the answer to 2=2t/5 + 2t/6 is also t = 30/11

so that shows evidence the two are equivalent (and it turns out they are)

Answer 38

but that doesn't work with my question.

Answer 39

want me to post the question?

Answer 40

ok what is the original question

Answer 41

yes please

Answer 42

Shannon and Macie are raking leaves to earn some money. Shannon can rake 2 lawns that are about the same size in 5 hours. Macie can rake 2 lawns that are about the same size in 6 hours. How long would it take both girls to work together to rake 2 lawns? Write and solve an equation for this situation. Explain how to set up the equation, using w = rt.

Answer 43

so you're really solving the equation

1/5 + 1/6 = 1/t

for t

Answer 44

ignore the 2 from the two lawns

think of doing 2 lawns as one complete job

Answer 45

that's not what it says to do in my lesson though... but okay. let's work your system first and see if it works

Answer 46

what's the LCD

Answer 47

its still 30

Answer 48

yes but keep in mind there's a t in the denominator as well

Answer 49

but the t's not supposed to be in the 'w' part

Answer 50

ok think of it like this

Answer 51

Shannon can rake 2 lawns that are about the same size in 5 hours

or put another way

Shannon can do one job in 5 hours

where a complete job is considered to be raking 2 lawns of the same size

Answer 52

so for Shannon only, her work/rate/time equation is

w = rt

1 = r*5

solve for r to get

r = 1/5

Answer 53

so her rate is 1/5 of a job per hour

Answer 54

Can I just put something out there: I think it's 3 hours. (or approximately three hours)

Answer 55

similarly for Macie, her equation is

w = rt

1 = r*6

r = 1/6

so Macie's rate is 1/6 of a job per hour

Answer 56

combined, their total rate is

1/5 + 1/6

jobs per hour

Answer 57

so if that's the 'r' in w = rt, then

w = rt

w = (1/5 + 1/6)*t

1= (1/5 + 1/6)*t

now solve for t

Answer 58

uhhh... you got me confused actually... so umm... gimme a minute

Answer 59

ok

Answer 60

wouldn't you still get 30/11 as an answer?

Answer 61

you would

Answer 62

but.. how does that work for the question?

Answer 63

which is 2.73 hours roughly

Answer 64

ohhhhhhhh!!! So the calculator was right!!! :D

Answer 65

that's how long it would take for them to work together

Answer 66

assuming one doesn't hinder the other

Answer 67

haha! okay, can you help me finish my test really quick? I have three questions left. :)

Answer 68

pleeeease