All Answers 359230 Answers

0

Thats is an exellent question!

GuestSep 29, 2013

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+2

It is just (3 squared) plus (2 squared). what is causing you a problem?

MelodySep 29, 2013

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I've only done part b
I have done this as a rough copy attachment.
I am notorious for making stupid mistakes but if you can follow at all it should show you how they are done.
If you would like me to explain better feel free to ask

Ajeng's problem .jpg

MelodySep 29, 2013

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0

verify:

[input]12/t-t=1[/input]

adminSep 29, 2013

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Divide by 60 to get 1%
then multiply by 40 to get 40%

MelodySep 29, 2013

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I don't think that the question makes any sense.

MelodySep 29, 2013

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Sorry, the question does not make sense.

MelodySep 29, 2013

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Scientific calculators have a pi button, you usually have to press shift or inverse first.
For simple calculators just use the approximate value of 3.14159

MelodySep 29, 2013

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Sorry the question does not make any sense.

MelodySep 29, 2013

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I won't answer your question but I will tell you that 3^(-4) = 1 / 3^(+4) = 1/ 81

MelodySep 29, 2013

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+1

You have to add up the 4 lengths and then divide by 4 to get the average.

MelodySep 29, 2013

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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.

MelodySep 29, 2013

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+1

I have no idea what your question means.
Can you explain yourself better?

MelodySep 29, 2013

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With your fingers.

MelodySep 29, 2013

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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.

MelodySep 29, 2013

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+1

How much does an atom of iron weigh? I guess you could google this just as easily as I could. Cheers.

MelodySep 29, 2013

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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.

MelodySep 29, 2013

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+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.

MelodySep 29, 2013

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+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

MelodySep 29, 2013

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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

MelodySep 29, 2013

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I'm sorry but the question does not make sense.

MelodySep 29, 2013

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What is the absolute value of 9?
What is the absolute value of -9?
There are 2 possible equations to make the problem true.
So, there are two answers.
I don't actually want to do it all for you.
Is this enough help?

MelodySep 29, 2013

0

hi

start by multiplying everything by t, to get

[center]12-t ²=t[/center]

then take the t to the other side

[center]-t ²-t+12=0[/center]

now, you've got values for a, b, and c so you should be able to use the quadratic formula. (a=-1, b=-1, c=12)

bye.

GuestSep 29, 2013

Sep 28, 2013

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What does BM stand for?

MelodySep 28, 2013

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The square root of 5 is an irrational number so it cannot be written exactly as a fraction or a decimal. It can only be estimated.

MelodySep 28, 2013

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