Answer:
Explanation:
so the scale factor is 7:2
so we need to find 2 * x = 7
3.5 * 2 = 7
Multiply each length by 3.5 to find their new side lengths so:
12 * 3.5 = 42
9 * 3.5 = 31.5
5 * 3.5 = 17.5
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