It is exactly just a convention we agreed on. Once agreed on, everyone uses it and it works. It could have been decided that it should work that addition and subtraction should work first instead of multiplication and division and then everything would have to be rewritten.

One way to sort of get around this is to use something called REVERSE POLISH NOTATION, which places operators and operands explicitly in the order we want to execute them. You place the operands first, and then the operator after them so;

In your first example, to get 7, you would write

2 3 x 1 +

which means take the operand 2 and the operand 3, then apply the multiplication operator them. Now take the result (6) and use that as the new operand and take the operand 1 and apply the addition operator and you get 7

In your second example;
1 2 + 3 x

which means take the operand 1 and operand 2 and apply the addition operator to them, then take the result (3) and the operator 3 and apply the multiplication operator to them which equals 9

So if you want to, you can use that (many calculators actually use that), BUT it is simpler to just memorize PEDMAS (or BEDMAS is you like "brackets" over "parenthesis") and stick to the conventions we always use.

TLDR: Yes, everyone just agreed to use that order.

How do you know which one to pick? Just buy 3-packs (and use them lol) till you find the one that is comfortable for you and your partner.

Charters schools are publicly funded schools, like traditional public schools, but they have more flexibility to experiment with different teaching methods and curricula. They also have more autonomy from state and district regulations. Charter schools receive public funding and are held to the same standards as traditional public schools, but they are often exempt from certain laws and regulations, giving them more freedom to design their own curriculum and implement it. Charter schools also typically have more leeway to hire and retain teachers, as well as to act as their own school boards. Traditional public schools, on the other hand, are bound by local and state laws, as well as rules and guidelines set by the district board.

As others have said, it is just convention. The convention relies on an implied order for summation and multiplication, and that can get you into trouble if you're not careful to provide the explicit order. For example, when for part of your problem, you come up with the equation X = 2Y + 4. In another part, you discover that Y = X + 4. You substitute X+4 for Y in the first equation and you come up with X = 2X + 4 + 4. This is wrong, but a student early in their learning might not immediately understand why. I should have used brackets/parenthesis around the substitute term when I replaced the variable. X = 2[X+4] + 4

If the implicit order of operations (the "DMAS" part of "BEDMAS") is causing you problems, I suggest eliminating it before you start working on the problem. Translate the problem from an implicit order of operation to an explicit order of operations: BRACKET ALL THE THINGS!

X = 2Y + 4 <-- Nah.

[X] = [ [2 * Y] + [4] ] <-- Yes!

It might be a crutch, like counting on fingers to add or subtract, but it was the only thing that worked for me. I still use it when I'm not completely sure that Excel and I agree on the implicit order in a formula.

it's a pretty common placeholder verb

Most of these answers are incorrect. It isn’t PEMDAS simply because some mathematicians decided that’s how it should be, PEMDAS is there because that’s how math works naturally.

For example, 1 + 3 x 4 = 13. This is objective, not subjective depending on what mathematicians agreed to follow. This is because 3 x 4 is just addition on its own, ie 3 x 4 = 3 + 3 + 3 + 3 or 4 + 4 + 4, both equal 12. This is also why multiplication is reversible.

Mathematicians DID just use multiplication in order to shorten the equation though, it’s much easier to write 3 x 4 rather than adding 4 3s together.

To put this in a real life term, let’s say you are having a party, you invited 3 people and each of them is bringing 3 friends. So in essence each of your friend groups total 4 people, 1 + 3 x 4 = 13 total people, which is correct for the attendance. 1 (yourself) + 3 (groups of friends) x 4 (people per friend group) = 13 total people. If you added 1 and 3 first you’d get 16 total people and your party would be a let down with less people coming.

Mathematicians can’t just change it by all agreeing and saying add the 1 + 3 first and still result in a correct answer.

To put that in even simpler terms, imagine you have 5 boxes of 12 eggs, and an extra 2. That's 2 + 5 x 12. But if you add first, you'd have a lot more complicated way of trying to express that. It's not a law of nature, but there is a practical use case that made selecting multiplication first a clear choice.

is "frobnicate" something you made up or a term you heard somewhere else? is it popular? i fkn love it it made me think of "rekafoobulating the energymotron" from futurama and i'm gonna use it all the time xD thank you

That’s fun, but there’s actually reason to believe that adjective ordering really is based on more than simple convention. In particular it seems to hold across many different languages.

https://medium.com/ontologik/the-universal-adjective-ordering-mystery-not-a-mystery-c10614e50761

Edit: The Chomsky Universal Grammar stuff in that article is bullshit though.

United Kingdom of Great Britain and Northern Ireland as it has been known since 1922 has a complex history. It's not technically a country but a nation state.

It's composed of two countries, Scotland and England. They were joined under the act of the Union of 1707 signed by both parliaments.

Wales was often referred to as a principality as it was incorporated into England way back in 1301. England and Wales make up the original United Kingdom.

So Wales joined the 1707 Union under the authority of England, although it retained Welsh culture and language and in recent years, especially it has come to be recognised as a country, perhaps more so since 2011 when it's got it's own devolved government

Northern Ireland is region, though it has its own devolved assembly. It's the bit Britain kept hold of following Irish independence in 1922.

After a nearly three century hiatus the Scottish parliament reconvened in 1999 following devolution.

I'm talking a lot about devolution that's basically how it sounds. Unions evolved in different ways at different times and then devolved back again.

England doesn't have its own parliament. Why? There's no need for one as it makes up around 83% of the UK parliament. Perhaps one day it will.

America celebrates it's independence day July the 4th each year. In 1776. The United States of America emerged from british colonies. They've never been countries as far as I know but I may be wrong about that.

TL:DR Being a country isn't a matter of self identification, but perhaps you may identify more strongly as being a citizen of a particular state over being an American. If enough people felt that way perhaps an American state can become independent and be a country but it's likely to be a long and difficult road because power is never given up lightly and you've not had the historical precedent.

Man, Ty! I absolutely loved that video. Now I'm team rebrand all dairy cows as good meat all the way.

This is absolutely, positively, 100% the correct answer to the question about crack cocaine specifically. The phrase "crack babies" is a racist, classist dogwhistle.

This is not to say that using cocaine in any form is safe during pregnancy! It can cause pregnancy complications, but a baby born addicted to crack is not one of them.

That said, most babies whose mothers used opiates during pregnancy (including methadone maintenance therapy) will experience opiod withdrawal symptoms after birth. This is called neonatal abstinence syndrome and is characterized by hypertonicity, irritability, vomiting/diarrhea, sneezing, poor sleep, poor feeding, and/or a distinctive high-pitched cry.

Other constructs return control to the thing that called them, keeping the line of processing much much clearer.

The alternative is what we call "spaghetti code", where determining the true path through the code is damned near impossible...like trying to follow a strand of spaghetti through an entire bowl of it.

Wait until you learn the English order of adjectives!

edit: not just English. TIL! :-)

Personal walkie-talkies work on a smaller range of frequencies and they send out analog signals. These are basically "raw" signals without any special encryption or compression or processing. An analogy would be with light waves, and shining a flashlight towards your neighbor's window. Anyone with eyes who knows which house is going to be sending a message can look at that window and see the light.

Cellphones are on a larger range of frequencies and they send out digital signals. When you talk into the phone, it gets processed into bits (0s and 1s), sort of like recording a sound file. And that takes up space, so the phone then compresses it so it takes up less space (and also reduces the quality of the audio), and then sends that over several varying frequencies so it can all be received at the same time at the destination location, where it then has to be decompressed and converted back into an analog signal (sound). And there are different ways of delivering that signal to the target phone, for instance, it might get cut up over a few different frequencies or sent out along with other calls on the same frequency (just received and decoded by the appropriate recipient). All that means that even if you happen to tune in to the same frequency that someone else's phone is broadcasting at, you're not necessarily keyed in to the same timing and signal that it's sending at, and because it's digital your phone won't actively be decoding whatever it is receiving because it's not on an actual call.

They aren't grown to adulthood usually. Some are slaughtered right away to make Bob veal, some are formula fed to make white veal, some are gain fed to make red veal, some are intermediate or pink veal.

https://en.m.wikipedia.org/wiki/Veal

The milk industry and the main beef industry are mostly kept separate and are different breeds. Though, old cow are sold as cheap beef once they are done.

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>or is it just a convention we just agreed on?

Pretty much. It's called PEMDAS.

You could, in your daily life, go against it BUT you would need to be consistent with it. So does everyone.

You could do it with numbers (the symbols) just as long as the flow of logic is consistent.

Several reasons. Encryption is one. Your phone has unique network identifiers that the network uses to connect a voice call or send/recieve data to only your phone.

They gave up that sovereignty when they joined the Union as States.

sooooo, function() ?

i think the main issue is more like

• IF condition Then
  • do this stuff
  • #Xanadus
    • do some shit
  • do shit only needed at fall through
• Else
  • other stuff
• end if

#goto Xanadu

it lead to horrible references.

Most commercial walkie-talkies are not encrypted in any sense; they broadcast the signal plainly, so any similar walkie-talkie can read the signal.

A cellphone is connected to a cell tower to place and maintain the call. The cell tower encodes each cellphone's connection with a specific code to keep the data separate. A phone can only interpret the data that is encoded with their specific code; they will ignore others, so as to not generate extraneous noise on the call.

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It's like starting a debate over which is better, Mercedes or Porsche... Then in response to an opinion, insisting cars should be outlawed in favor of bicycles only. It's just a different, if superficially related, subject.

Hawaii, yes.

Texas, no. It was only recognized by a handful of countries (the United States was not one of them) and Mexico stopped fighting but did not give up their claim to the territory until after the US-Mexican War. Same with California and Oregon.