Uma used the expanded algorithm to solve 62 x 13. She wrote 13 x 62= 6 + 2 + 180 +60=248. What did she do wrong? Explain what pa
2 answers:
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Answer:
x = 5
Step-by-step explanation:
Δ EAB and Δ EDC are similar by the AA postulate , so the ratio of corresponding sides are in proportion , that is
=
, substitute values
=
( cross- multiply )
10(x + 3) = 4(2x + 10 ) ← distribute parenthesis on both sides
10x + 30 = 8x + 40 ( subtract 8x from both sides )
2x + 30 = 40 ( subtract 30 from both sides )
2x = 10 ( divide both sides by 2 )
x = 5
Answer:
= 0.25
Step-by-step explanation:
9-8 = 1