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anonymous
 one year ago
If 2 pounds cost $8.40, whats the cost of 3.5 pounds?
a. $12.50
b.$10.75
c. $14.25
d. $14.70
anonymous
 one year ago
If 2 pounds cost $8.40, whats the cost of 3.5 pounds? a. $12.50 b.$10.75 c. $14.25 d. $14.70

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\(\begin{array}{ccllll} lbs&\$ \\\hline\\ 2&8.40\\ 3.5&x \end{array}\implies \cfrac{2}{3.5}=\cfrac{8.40}{x}\impliedby \textit{solve for "x"}\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I don't really understand

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0hint: crossmultiply

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0hint #2:dw:1443830964132:dw

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0dw:1443830996696:dw notice how I multiplied along the black arrows?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0that's what cross multiplying is. that gives us 2x = 3.5*8.40 solve for x
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