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Melody
Username
Melody
Score
114826
Membership
Stats
Questions
889
Answers
31775
910 Questions
32434 Answers
+2
51
2
+114826
Algebra inequality.
Hi all,
no I am not asking a question, I am just answering for someone off this site.
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Melody
Oct 17, 2021
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Here is a question that has me puzzled
Here is a question that I am stumped on.
I put the equation into Desmos and it really is two straight lines.
The angle between them appears to be always
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Melody
Sep 19, 2021
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Since I am on lockdown,
Since I am on lockdown,
I have time to look at some old questions that had been put aside for a rainy day.
Here is one.
Maybe someone other than me might be interested ....
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Melody
Aug 17, 2021
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+114826
Hi Cal,
Hi Cal,
You have not been here for a while but maybe you are watching anonymously.
Happy Birthday and have a great day!
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Melody
Aug 12, 2021
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596
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Repost. It is an old one but I'd like to see the answer.
Anyone?
https://web2.0calc.com/questions/some-math_1
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Melody
Apr 16, 2021
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963
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+114826
Happy Birthday CPhill.
I am probably a tad late but I hope your birthday has been an excellent one!
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Melody
Dec 20, 2020
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I have been wondering about this one
I have been wondering about this one
https://web2.0calc.com/questions/help-meh-pls_1
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Tiggsy
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Melody
Dec 1, 2020
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I'm trying to find a specific question.
A saw a question recently about 2 similar 3-D figures.
It mentioned Surface areas and volumes.
It had a little pic of the 2 solids as well.
read more ..
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Melody
Sep 17, 2020
-2
662
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+114826
NEW WRAP , a big thanks to ilorty.
ilorty has reintroduced the 'WRAP'
This is an old idea that she is reinventing. I think this is great.
The idea is to give people forum news and a look at some of the more interesting questions that have been posted.
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Melody
Sep 3, 2020
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#2
+114826
+1
You have to add up the 4 lengths and then divide by 4 to get the average.
Melody
Sep 29, 2013
#2
+114826
+1
I think this question is in italian, I put it through a translator and this is what I got.
A trapezoid rectangle has the smaller base, the height and the oblique side respectively 9cm long, 4cm 5cm.sapendo cha and the projection of the oblique side on the basis mangiore is 3cm long, determine the extent of the perimeter
Unfortunately, I still don't understand the question. sorry.
Melody
Sep 29, 2013
#1
+114826
+1
I have no idea what your question means.
Can you explain yourself better?
Melody
Sep 29, 2013
#1
+114826
+1
With your fingers.
Melody
Sep 29, 2013
#1
+114826
+1
You could do it on your calculator if you have a fraction button.
otherwise
27 1/4 - 12 8/9
= 27 + 1/4 - (12 + 8/9)
= 27 + 1/4 - 12 - 8/9
= 27 - 12 + 1/4 - 8/9
= 15 +1/4 - 8/9
hopefully you will recognise that 1/4 is less than a half and 8/9 is more than a half. The first one needs to be the biggest unless you want to deal with negative numbers.
So I suggest you change 15 + 1/4 into 14 + 1 + 1/4 and, 1 and a quarter is 5 quarters.
so
=14 + 5/4 - 8/9
Now, you cannot add or subtract fractions unless the denominators (bottoms) are the same. You must find a number that 4 goes into and 9 goes into. 4*9 will work and in this case it is the smallest one.
So you will have to change it to 14 + something over 36 - something else of 36
and I am going to let you finish by yourself.
Happy puzzling.
Melody
Sep 29, 2013
#1
+114826
+1
How much does an atom of iron weigh? I guess you could google this just as easily as I could. Cheers.
Melody
Sep 29, 2013
#1
+114826
+1
Just convert the km to metres and do the division on your calculator. The units cancel out. the answer will just be a number.
or
You could convert the metres to km and do the division. The answer will be the same.
Melody
Sep 29, 2013
#1
+114826
+1
The probability of getting at least one heart is the compliment of getting no hearts.
What I mean is, you either get a heart or you don't so the sum of these 2 probabilities is 1.
All probabilities are between 0 and 1 (0 = can't happen) (1 = must happen)
The probability that the first chosen is not a heart is 48/52
now there are only 51 cards left and only 47 of them are not hearts so
The probability that the second chosen is not a heart is 47/51 etc
So
The probability that none are hearts is
P(no hearts) = 1 - [ 48/52 * 47/51 * 46/50 * 45/49 ]
I hope that you LEARN from my answer.
Melody
Sep 29, 2013
#1
+114826
+5
Firstly what is bidmas? Do you mean BODMAS ? If you mean bidmas please tell me what the i stands for?
BODMAS stands for
Brackets then
of (as in power of) then
division and multiplication equally important just work left to right then
addition and subtraction equally important just work left to right
Your first question is so easy that I am sure you can do it yourself. Just try putting the brackets in different places until it works.
The second one is a bit tricky. What i will tell you is that it is not 4 squared. There is only one place that you can put the first brackets to change this. There will be 2 sets of brackets altogether.
good luck. Happy puzzling
Melody
Sep 29, 2013
#1
+114826
+1
Without any brackets this expression is really
=35000 * x^2 - (x / 200) * x
=35000* x^2 - x^2 / 200
=x^2 * (35000 - (1/200))
=34999.995 * x^2
Melody
Sep 29, 2013
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