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Question
Which of the following is an example of using the buildup strategymethod of solving proportions?a) Allison bought 3 pairs of socks for $12. To find out how much ten pairs cost, find that $12 divided by 3 is $4 a pair, and multiply $4 by 10 for a total of $40.
b) A square with a length of 2 inches was enlarged by a scale factor of 4 and is now 8 inches long.
c) If 5 candy bars cost $4.50, then 10 would cost $9. (Because 5 x 2 = 10, multiply $4.50 by 2.)
d) If 2/3 = x/15, find the cross products, 30 = 3x, and then solve for x. x= 10.
Answer
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