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+118728

Aytothem:
simplify 125/8

MelodyMar 4, 2014

+118728

Guest:
jeremys teacher buys 6 packs of thumbtacks.she uses 18 thumbtacks to display poster boards around her room.which expression gives the number of tumbtacks she has left.

where are the expressions?

maybe

6N-18

where N is the number of thumb tacks in a pack.

MelodyMar 4, 2014

+118728

soccerruth22:
how do you put in fractions ?

3/4 gets entered as (3/4)
1 and 5/6 gets entered as (1+5/6)

MelodyMar 4, 2014

+118728

Melody:
puzzledmaths:
what are 2 different solutions to this

-3-(_/_)=5

worded:
minus 3 minus open bracket an unknown number divided by an unknown number closed bracket equals 5

Add 3 to both sides

-(_/_) = 8

mult both sides by -1

( _/_) = -8

Does that make it easier? There are an infinite number of solutions. You can probably find 2 all by yourself.

Remember, a neg/pos = neg and pos/neg=neg SO exactly one of the numbers will have to be negative.

ok, how about -16/2 or 800/-100 or -72/9

MelodyMar 4, 2014

+118728

kweensuzie:
solve 43>x+35

subtract 35 from both sides.

then swap sides, but , if you swap sides you will have to turn the inequality around.

MelodyMar 4, 2014

+118728

alexxis_delgado:
subtract (11/8) from the product of (2/5) and 5(1/2)

Product means multiply, subtract means minus. there is a calculator on this site and since you typed your question, your fingers are not all broken.
therefore, you can work it out by yourself.

MelodyMar 4, 2014

+118728

sparklelover:
ALVIN can dive to depths as great as 14,764 feet. What is its depth limit in miles? Round to the nearest tenth of a mile

How many feet are there in a mile. You can google this just as easily as I can. when you have this number, if you still can't do it I will THEN help you.

The imperial system has not been taught in Australian schools since 1971. Thank goodness I never had to learn it.

MelodyMar 4, 2014

+118728

Guest:
Holly has 25 fish in her aquarium. Tommy has one-fifth of fish that Holly has. Jared has three times as many fish as Tommy. If they were to combine all their fish in the new school aquarium, how many fish would there be in all?

Just work it out one bit at a time,

Holly has 25 fish, Tommy has 1/5 of this. How many does tommy have?
Jarad has 3 times as many as Tommy. How many does Jarad have?
How many are there all together , add them up.

MelodyMar 4, 2014

+118728

kaila12700:
what is the answer if r is 20 and h is 70?

The answer to what?

MelodyMar 4, 2014

+118728

herlert:
can i have help finding w?

l=2
h=3
d=18
w=?

d=sqrt(l^2+h^2+w^2)

If you are not very confident with algebra you might prefer to do the substitution first.

18 = sqrt( 4+9+w ²)
18 = sqrt( 13+w ²)
Now you really do have to square both sides
324 = 13 + w ²
311 = w ²
w = + or- sqrt(311)

MelodyMar 4, 2014

+118728

cheesecake.binyard:
what is fraction division? and why the answer to the fraction division problem is bigger than the original numbers?

6 divided by 2 means how many 2s are there in 6
2+2+2=6 so the answer is 3

3 divided by 1/2 means how many 1/2s are there in 3
1/2 +1/2 =1
so
1/2 +1/2 + 1/2 +1/2 + 1/2 +1/2 = 3
There are 6 halves here so

3 divided by a 1/2 = 6

So is you divide by a number less than 1, your answer is bigger than the original number.
------------------------------------------------------------------------------------
also 3 ÷ (1/2) = 3 x (2/1) = 3 x 2 = 6
To divide by a fraction you invert the second one (that is the one you are dividing by) and multiply.

MelodyMar 4, 2014

+118728

Edward Cullen:
Heyyos. How is everyone today? JUST WONDERING!!! hey babie

Hi Edward,
I am very good thank you.

MelodyMar 4, 2014

+118728

walid:
-4=u-3

add 3 to both sides.

MelodyMar 4, 2014

+118728

Goku123:
:roll: A plane flew at a constant speed and traveled 760 miles in 5 hours.
How many miles could the plane travel in 3 hours?

First work out how far the plane can fly in 1 hour. How could you do this?

If this is too difficult it might be easier if you look at a similar problem with little numbers first. Work out what to do with those and then do the same thing with the big numbers
eg I walk 10miles in 5 hours. How far will I walk in 1 hour.?

Then work out how far it can go in 3 hours.

MelodyMar 4, 2014

+118728

myyy:
:oops: what are the least common multiples of 8 and 10

The multiples of 8 are 8,16,24,32,.....
The multiples of 10 are 10,20,30,.......

Keep going with thses numbers until you get a multiple that is in both list. That number will be the least common multiple.

MelodyMar 4, 2014

+118728

lexidawn:
:oops: what do i do if i have two numbers on both sides of the equal sign?

do you mean something like

10=8 ?

there is no answer, 10 will never equal 8

MelodyMar 4, 2014

+118728

Hi,

History from Egypt ?

Do you have a question?

هل لديك سؤال؟

MelodyMar 4, 2014

i have to add any two numbers that will make this

-3 - ( ? / ?) = 5

equation true

?= two unknown numbers

GuestMar 4, 2014

there is no number both are blank and i still don't get it

GuestMar 4, 2014

+72

Tibbers wrote: What is the area of a rectangle with a length of 3.4 meters and a width of 1.7 meters?

Well the area of a rectangle=length*width
=> A=l*w
=> A=3.4m*1.7m
=> A=5.78m^2

Princess Sophie EMar 4, 2014

+118728

PreciousAngel151:
1.5*10^25/6.02*10^23

Which is broken? Your finger or your calculator.
There is a calculator on this site that you can use.

MelodyMar 4, 2014

+118728

puzzledmaths:
what are 2 different solutions to this

-3-(_/_)=5

worded:
minus 3 minus open bracket an unknown number divided by an unknown number closed bracket equals 5

Add 3 to both sides

-(_/_) = 8

mult both sides by -1

( _/_) = -8

Does that make it easier? There are an infinite number of solutions. You can probably find 2 all by yourself.

Remember, a neg/pos = neg and pos/neg=neg SO exactly one of the numbers will have to be negative.

MelodyMar 4, 2014

#16

+118728

+11

Hard one (I'm curious to see whether anyone can find a different strategy than I found.) :

Steve again wants to play a game with you but you need $2 for each time you want to play.
Now, each time you play the game, Steve has the computer print 100 blank cards with 100 random different integers.
After that you can flip the cards for as long as you like until you choose to stop flipping. If your last card flipped is the highest card in the deck you will win $10.

Think of a strategy where you expect to win money in this game.
Hint: The cards you previously flipped can give you some kind of information.
-----------------------------------------------------------------------------------------------------------------------------------------------------------
Alright then. I am assuming that I can only go through the 100 cards once.
I'll split the deck into 2deck of 50 cards each.
I'll go through the first 50 cards and note the highest integer.
Then I will stop at the 1st integer higher than this one in the second 50 cards.
If there are non higher then, I would have lost already.

The chance of success is not particularly high but it is better than no strategy at all.
Have you got a better idea reinout-g?

MelodyMar 4, 2014

#13

+118728

reinout-g:
New puzzle!
Three rivalling trainers (Pierre, Pieter and Peter) and their three athletes (Édouard, Eduard and Edward) want to cross a river.
There is only one boat which can carry two persons.
The trainers do not want other coaches to sit with their athlete.
How can they cross the river?

Firstly, i can't handle all those Ps and Es
Mine are going to be Cs and As

We have
C1, A1, C2, A2, C3, A3 to get across the river
first C1 and A1 paddle across the river C1 stays

A1, C2, A2, C3, A3
Now C2 and A2 paddle across the river C1 and C2 stay

A1, A2, C3, A3
Now C3 and A3 paddle across the river C1, C2 and C3 stay

A1, A2, A3
Now A1 and A2 paddle across the river C1, C2, C3, A1 stay

A2, A3
Now A2 and A3 paddle acrosst the river and they are all safely on the other side.

MelodyMar 4, 2014

x<8

GuestMar 4, 2014

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