Question

Which equations could be used to solve the problem?

A 50-gallon drum is leaking water and will be empty in 12 h. At what rate is the drum being emptied?

Choose exactly two answers that are correct.


A. r = 12 h/50 gallons
B. 50 gallons - 12 h = r
C. 50 gallons - 12 h * r
D. 50 gallons/12 h = r

please help

Answer 1

i got no idea how to solve this

Answer 2

is dis rates?

Answer 3

yes constant rates

Answer 4

:) this is easy i did a test on this a few min ago and passed

Answer 5

rly? u in k12?

Answer 6

yes and answer is A.

Answer 7

just divide the Hours by the gallons

Answer 8

ah thanks couple more ? im rly bad at math

Answer 9

ok :P but if i dont respond im afk

Answer 10

wait i can pick more than one in this question
do i pick another?

Answer 11

or is it just A

Answer 12

just a

Answer 13

A and C too

Answer 14

u sure?

Answer 15

nope

Answer 16

only A

Answer 17

)))

Answer 18

lol kk

Answer 19

A dump truck can haul 16 loads of dirt in 4 hours.

How long will the dump truck spend hauling 25 loads?

Answer 20

i say 6 hours

Answer 21

4 loads every 4 h

Answer 22

yeah that one was ez next XD

Answer 23

A pumping station pumps 340 gallons of water in 8 minutes.

How many gallons does it pump in 20 minutes?

A.
6800

B.
360

C.
850

D.
500

Answer 24

i think its C

Answer 25

brb

Answer 26

k

Answer 27

@iGreen can you help me?

Answer 28

@ziferot do u know?

Answer 29

i want to make sure that question 1 is correct with a.

Answer 30

is my 3d question right ?

Answer 31

340/8 * 20

Answer 32

ah yes! thanks C

Answer 33

Not at all

Answer 34

giving out direct answers, even the wrong direct answers, is not what this site is for ....

Answer 35

yeh 2. is C. thanks for helping on that one @Ziferot i was getting my food out the over xD

Answer 36

The table shows a direct variation.

What is the constant of variation?

x y
2 4.8
4.5 10.8
6 14.4

(insert decemal here)

Answer 37

@amistre64 minercity gose to k12 i also go to k12 they do things different i know how it works.

Answer 38

how they work and how this website works are two different things. this is a study site ..

Answer 39

true xD sorry for direct answers ill just leave now :(

Answer 40

aw crud well bye =(

Answer 41

question 1 is not A ....

Answer 42

also i gtg :P because i got a class connect sorry @minercity

Answer 43

this is my last try to get this done i just need somebody to help me solve it and ok bye =(

Answer 44

we are emptying gallons per hour, so the solution will be a rate of gallons per hour.

Answer 45

so um what form would that be in?

Answer 46

for question 1

gallons/hour

how many gallons and how many hours are stated in the question?

Answer 47

50 gallons 12 h

Answer 48

then 50g/12h is fine :)

Answer 49

ok thanks! did my other questions get the right ancwer?

Answer 50

what was the 2nd question? can you retype it?

Answer 51

A dump truck can haul 16 loads of dirt in 4 hours.

How long will the dump truck spend hauling 25 loads?

Answer 52

i say 6 h to load 25 loads or dirt

Answer 53

of*

Answer 54

consider: loads per hour

16loads/4hours = 25loads/xhours

16/4 = 25/x

do you know how to solve the proportion?

Answer 55

4 loads pr h so 6 h to load 25

Answer 56

right?

Answer 57

6hrs is close; 16/4 = 4, so 4 loads an hour

6hrs*4/hr = 24 loads so we are close, but a little off.

Answer 58

16/4 = 25/x

4 = 25/x

4x = 25

x = 25/4 = 6 1/4

so 6 hours and 1/4 of an hour

Answer 59

what is that as a decimal? it wont fir in the box XD

Answer 60

wait i know

Answer 61

ok and this i have no clue what it is!
The table shows a direct variation.

What is the constant of variation?

x y
2 4.8
4.5 10.8
6 14.4

(insert decemal here)

Answer 62

a direct variation has the form:

y = kx, where k is the constant of variation

solving for k we get: k = y/x

so pick any point, and determne the value of y/x

Answer 63

4.8/2 looks simple enough

Answer 64

err ok

Answer 65

so 2.4?

Answer 66

2.4 should be fine yes

Answer 67

ok

Answer 68

6(2.4) = 14.4 so its working for us

Answer 69

Which tables show a direct variation?

Choose all answers that are correct.
x y
1 4
3 6
5 8


A.
x y
1 1.2
2 2.4
3 3.6


B.
x y
5 15
10 30
15 60


C.
x y
3 6
6 12
9 18


D.

Answer 70

sorry its a lil messed up

Answer 71

but whaterev is on top of the letter say D is the question choice

Answer 72

and i can pick more than 1

Answer 73

lets test them out

a direct variation will have a constant multiplier, that k value

x y
1 4 <<<<< notice that 1(4) = 4, so 4x is what we want
3 6 <<<<< 4(3) is not 12 so this one aint gonna be it
5 8

Answer 74

x y
5 15 <<< 5k = 15, what is k gonna be?
10 30 does 10k = 30 ?
15 60 does 15k = 60 ?

Answer 75

yes? and 5k

Answer 76

5k = 15, 5 times 3 is 15 .. so k=3

10(3) = 30
15(3) = 45, not 60 so this cant be good can it?

Answer 77

nope

Answer 78

lets test the next one :)

Answer 79

i think B is one of them

Answer 80

we just tested B and it failed the test ...

Answer 81

oh i was looking at the wrong place sorry

Answer 82

if you meant C, it is good :)

3(2) = 6
6(2) =12
9(2)=18

y = 2x is a direct variation

Answer 83

ok

Answer 84

hmm, you said the option LETTERs where messed up dint you

Answer 85

yeah

Answer 86

A
x y
1 4
3 6
5 8


B
x y
1 1.2
2 2.4
3 3.6


C
x y
5 15
10 30
15 60


D
x y
3 6
6 12
9 18

Answer 87

ah there we go

Answer 88

then yeah, B is good .... and D is fine as well

Answer 89

kk thanks

Answer 90

i was thinking when you said B was wrong i got confused XD

Answer 91

yeah, these old eyes of mine had the lettering mixed up eh :)

Answer 92

lol

Answer 93

i have to go pick up one of my kids so ill have to let you go. becareful on this site and never accept a direct answer :) good luck

Answer 94

Which equation is shown on the graph?
http://static.k12.com/calms_media/media/720000_720500/720333/3/a14c2d8e51f2ee4ec464c9396b29652991304263/77003_question.jpg

A y=4x
B. y=x+4
C. y=1/4
D. y=x

no clue

Answer 95

oops didnt see your message and ok bye!

Answer 96

we know y doesnt equal x since the point 10,10 is not hitting th eline

we know when x=0, y doesnt equal 4 so B is out

y changes so its not held constant so C is out

when x=10 y = 40 so y = 4x, which is the only one left makes the most sense ..

ciao :)

Answer 97

thanks bye!