How many gallons each of 25 alcohol and 5 alcohol should be mixed to obtain 20 gal of 15 alcohol?
1 answer:
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<h3>Answer:</h3>
3 11/15 cm
<h3>Step-by-step explanation:</h3>AE is the angle bisector of ∠A, so divides the sides of the triangle into a proportion:
... BE:CE = BA:CA = 7:8
Then ...
... BE:BC = 7 : (7+8) = 7:15
ΔDBE ~ ΔABC, so DE = 7/15 × AC
... DE = 7/15 × 8 cm = (56/15) cm
... DE = 3 11/15 cm