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raphaelll
 one year ago
Evaluate the following. Write down the question and all steps of your solution.
16x4+3(2 ³ x5)
raphaelll
 one year ago
Evaluate the following. Write down the question and all steps of your solution. 16x4+3(2 ³ x5)

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zepdrix
 one year ago
Best ResponseYou've already chosen the best response.3\[\large\rm 16\times4+3\left(2^3\times5\right)\]Remember your PEMDAS or something similar? It tells us how to prioritize these operations. P = Parentheses. That takes the highest priority. So we have to start here: \(\large\rm 2^3\times5\) Now that we're in this room, within the brackets... What do we prioritize first, Exponent, or Multiplication?

raphaelll
 one year ago
Best ResponseYou've already chosen the best response.0I don't think i've ever heard of PEMDAS however since the second letter is E i would assume exponent?

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.3Good. So apply the exponent BEFORE doing multiplication. \(\large\rm 2^3=2\cdot2\cdot2=8\) So within the brackets we have \(\large\rm 8\times5\)

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.3\[\large\rm 16\times4+3\left(2^3\times5\right)\]\[\large\rm 16\times4+3\left(8\times5\right)\]\[\large\rm 16\times4+3\left(40\right)\]Now that we've done everything in the brackets, we can drop the brackets and just treat it as multiplication.\[\large\rm 16\times4+3\times40\]So what next? Addition or multiplication? :)

raphaelll
 one year ago
Best ResponseYou've already chosen the best response.0multiplication first

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.3k good :d do the multiplication for both of those groups, what do you get?

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.3cool \c:/ looks correct!

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.3Raphael, hmmmm wasn't that one of the Ninja Turtles? ;O

raphaelll
 one year ago
Best ResponseYou've already chosen the best response.0Cool thank you! i really need to remember PEMDAS, made it really simple, and yeah haha my parents named me after the saint though :)

raphaelll
 one year ago
Best ResponseYou've already chosen the best response.0Thanks for your help!

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.3I generally prefer to write it like this:dw:1441615777129:dwBecause you are NOT suppose to prioritize multiplication above division. They are on the same level. When you have a problem involving multiplication AND division steps, you'll need to deal with them `from left to right`, you don't necessarily do the multiplication first. Example:\[\large\rm 100\div5\times4\times3\]You would do the \(\large\rm 100\div5\) step FIRST since it is further to the left.

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.3Just something to keep in mind :)

raphaelll
 one year ago
Best ResponseYou've already chosen the best response.0Got it, so when it comes to questions that have multiplication and division , left to right is the order to do it in. Also, whilst you're here, how would i go about doing a question which was 8 to the power of negative 6 X 8 to the power of three since there is a negative power?

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.3Oh I posted response in your original question. Click the notification to get back to it :D

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.3The little sign post in the upper left corner with the orange popup on it.
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