franco43
23.01.2020 •
Mathematics
Andrea brought a diamond necklace for $61.75. there was a discount of 5. what is the orginal price?
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Ответ:
original-discount=sale
100%-5%=95%
61.75=95% of original
61.75=0.95 times original
divide both sides by 0.95
65=original
the original price was $65.00
Ответ:
Step-by-step explanation:
Use triangle congruency:
BC=EC, AC=DC - Given
m∠DCE = m∠ACB because they are vertical angles
Therefore ΔABC ≅ ΔDEC because of Side-Angle-Side congruency
AB=DE because corresponding parts of congruent triangles are also congruent (CPCTC)