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anonymous
 one year ago
Algebraic expressions..
Evaluate 3xy2 for x = 3/4 and y = 2/5
anonymous
 one year ago
Algebraic expressions.. Evaluate 3xy2 for x = 3/4 and y = 2/5

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welshfella
 one year ago
Best ResponseYou've already chosen the best response.1you replace x by 3/4 and y by 2/5 in the expression and work it out. = 3*(3/4)  (2/5)^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I know i plug it it in so it would be 3(3/4)  (2/5)^2 right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i dont like working with fractions i always get confused

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1multiplying fractions is not too difficult just multiply top and bottom: dw:1440933535144:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1* thats 15 not 35!!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is there more steps?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1yes do the multiplication and squaring first finally subtract

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440933718810:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the first one was just an example right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do i multiply the 4 and 3

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1no  multiply the top numbers that is 3 and 3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay i got 9/4  4/25 is it wrong?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and then i subtract?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the answer on the worksheet says its 2 41/100dw:1440934161182:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1notice that 9/4 is an improper fraction I ts easier at this stage to convert iutto a mixed number 9 divide by 4 is 2 and there is a remainder 1 so 9/4 = 2 1/4

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1so we have dw:1440934184640:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1sorry it was negative 9/4  4/25 not 9/4  4/25

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1now you can only subtract and add fractions withe the same denomiantor so you need to find the LCD (Lowest Common Denominator) of 4 and 25

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1LCD of 4 and 25 is 100

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1so converting 1/4 to hundredths we multiply the top ond bottom of the fraction by 15 dw:1440934433350:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0does the 2 dissapear?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1and dw:1440934510629:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1No we'll bring that in at the end

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1so we have now got dw:1440934591025:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0OH!! I understand now :) thanks so much!

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1good Try and practice some more problems of same type and you'll gain confidence

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1fractions are a bit tricky

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes i will thank you!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay i just tried figuring out how to get 41 do you subtract the 25 and 10?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1 and watch the negatives  i forgot them a few times myself!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you add 2 to 25 and add 2 to 10? and that gives you 39? and 2 + 41 = 39

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i thought that was a 10 sorry

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1you are really adding negative numbers 16 + (25) = 41 Tha'ts what makes this one extra tricky  you have negatives and fractions..

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1 thats my bad drawing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay i just checked my work :)

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1lets try 3/16  7 / 16 what does that equal?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1yea so its 10/16 when add/subtract the denominator stays the same

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah i always get confused by negatives
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