Substitute and evaluate: x=8, y=6, m= 3,
7. 4x-2m =
8. ym
9. 2y + x
Il
10. 6 + 8.
Il

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

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If the scale factor between two circles is 2x/5y what is the ratio of their areas?